As it mentions, “online IMVOCAL users can be reached on their IMs from any phone, anywhere in the
US, UK, France, Australia, Singapore and Japan.”

Update: The service has been discontinued. Another similar tool you can try is Numbr.

Here’s how it works:

1. Sign up with IMVocal (free).
2. Choose a 9 digit unique internet call-in indentifier (your vocal id).
3. Accept request to add IMVocal as a buddy in your IM client (Yahoo, Gtalk, AIM or MSN ).
4. A user can call you by dialling IMVocal’s country specific toll free no. followed by your vocal id.
5. You receive an incoming call on your IM. Simply accept it and start talking.
6. The caller can leave you a voicemail too if your are not online.

Feature overview:

• Get an internet phone number for your IM
• Currently supports GTalk, Yahoo, MSN and AOL more will be added.
• Supported countries: US, UK, Australia, Singapore, Japan.
• Display you number without revealing your identity.
• Get instant message and free voicemail alerts.

Check out IMVocal @ www.imvocal.com (Contributed by Abhijeet from Jeet Blog)

Update: The service has been discontinued. Another similar tool you can try is Numbr.

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• Yeigo: VoIP and Instant Messaging for Your Mobile
• Switchboard : Browser-to-Browser Internet Phone
• NimBuzz: IM and VoIP Client for Your Mobile
• LoudTalks : Cool Voice Messaging Tool
• Fring : Free Mobile Calling and Chat

Before you can make your first free call go to PokeTalk website and signup. Once you have registered enter your phone number and the number you wish to call. Click on the “Call” button and wait for your phone to ring. When you answer it PokeTalk will connect you with the person you called.

Features:

• Free international calling to 55 countries worldwide.
• You can call both mobile and regular numbers.
• Each call is limited to 10 minutes.
• No headphones and mic needed.
• Other sites to make free long distance calls: FreeRinger and DukaUS.

For more info watch demo video below:

Check out PokeTalk @ www.poketalk.com

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• ViaTalkFree : Free Calls within US and Canada
• TruPhone: Make Free or Low-cost International Calls from Mobile
• Talkster : Free Long Distance Calling
• Ring2Skype: Receive Calls On Skype From Landline For Free
• NimBuzz: IM and VoIP Client for Your Mobile

- (1) Enter your friend’s phone number (incl. a country code) and press “CALL” button.
- (2) Ask your friend to call you back at the number displayed on their phone (you have 10 seconds).
- (3) Stay on the line and wait for your friend o dail he number and join you back on the call.

Features:

• Make free mobile and landline calls to 30+ countries worldwide.
• Make as many calls as you need. No restrictions.
• Recipients always asked to dial local numbers (same as calling a place in their neighborhood)
• See a list of supported countries here.
• Embed FreeRinger on your blog or website and allow your visitors to make free calls.
• Similar website: Evaphone.

You can try FreeRinger below.

Check out FreeRinger @ www.freeringer.biz

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• SimpleCountryCodes: Find out International Calling Codes
• WhoCallsMe: Identify Unknown Callers
• WhitePages: Address and Phone Number Look Up
• ViaTalkFree : Free Calls within US and Canada
• TruPhone: Make Free or Low-cost International Calls from Mobile

How does it work?

• Sign-up for a user account and verify your email address.
• Enter your phone and the phone number of the person you want to talk to.
• Click on “Start Your Call”.
• Wait for your phone to ring.

Features:

• Make free landline calls within US and Canada.
• Make as many free calls as you like.
• Add and manage your contacts list online.
• View your call history.
• Note: Calls to and from mobile phones are not free.

As mentioned above, dukaDIAL works only for landline numbers within United Stated and Canada. If you’re looking for similar web app that also works for mobile phones see MakeUseOf free calling category.

Check out ducaDIAL @ labs.jaduka.com/dukaDial

Apart from ducaDIAL Jaduka Labs got a number of other cool web apps you might be interested in:

Earthcaller – Make free calls to US and Canada landlines from your computer.

dukaBUZZ – Enable your site visitors to leave you audio messages.

duhBATE – Create your own presidential duhBATE by adding your voice to your favorite politician and then share it with your friends.

dukaLINK – Create HTML hyperlinks that you can post on Craig’s List, Facebook, your blog, or emails. When users click your dukaLINK, they’re prompted to submit their phone number to automatically initiate a free phone call to you.

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• CallingAmerica: Free Calling America from Abroad Made Easy
• YardSaleTreasureMap: Yard Sale Locator
• Woot: One Deal a Day
• Voyij: Best Travel Offers and Deals For Any Destination
• ViaTalkFree : Free Calls within US and Canada

There are two ways to use Dexrex.

(1) Firstly, it’s an online instant messenger for AIM, GTalk, WLM / MSN, Yahoo and Skype. Simply login using your username and pass and you will be able to chat with your buddies directly from the browser window.

(2) Alternatively, you can download the Dexrex addon for your chat program. In the latter case, Dexter automatically monitors your chat conversations and stores them in your online account. Currently it offers addons for AIM, Pidgin and Skype.

Features:

• Store, search, share, and access your chat history whenever and wherever you want.
• Upload and export existing conversations to Dexter.
• Supported chat clients: AIM, Windows Live Messenger, Skype, Yahoo! Messenger, Pidgin, Trillian, Digsby, Miranda, Instantbird, Meca, Mercury, Emesene, and MSN.
• Login and chat with contacts online using your existing username and pass.
• Blackberry usres: Store your SMS messages online.
• And more … For more details check out the Dexrex demo video below.

Dexrex Intro Video

Check out Dexrex @ www.dexrex.com

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• IM-History : Store Your Chat History Online
• Heysan: Chat with Friends Online from Mobile Phone
• Fring : Free Mobile Calling and Chat
• Yeigo: VoIP and Instant Messaging for Your Mobile
• WeBuzz.im: Online Multi Client IM Service

Features:

• Login to your favorite messenger and chat with friends from your mobile phone.
• Supported IM programs: MSN, AIM, ICQ, Yahoo and GTalk.
• No registration or sign up required. You can use your existing IM username and pass.
• Works with every mobile phone that has internet capability.

As usual, if you don’t have an unlimited data plan, make sure to check with your mobile carrier regarding the data usage fees.

Visit Heysan@ www.heysan.com

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• Dexrex: Store AIM, GTalk, MSN, Yahoo, Skype Chat History Online
• IM-History : Store Your Chat History Online
• Fring : Free Mobile Calling and Chat
• Yeigo: VoIP and Instant Messaging for Your Mobile
• WeBuzz.im: Online Multi Client IM Service

One of the other cool things about Truphone is that you don’t have to change anything about your current phone contract. You can continue using your mobile in exactly the same way as you used to. Truphone is just an extra application that can be activated when you’re in the WiFi Hotspot. That makes it ideal for frequent travelers who want to save on roaming charges.

Features:

• You pay the same amount for international calls regardless of your location. No roaming charges.
• Send free text messages and make free calls and to other Truphone users worldwide.
• Use Truphone from any public WiFi access hotspots worldwide (airports, libraries etc.)
• Google Talk support : Make free calls to your Google Talk contacts.
• Incoming calls from other Truphone users are always free.
• Forward your Truphone voicemail messages to your email address.
• Setup custom rings for different callers.

Note: Truphone currently works mainly on Nokia N and E series phones. Support for other handsets coming soon.

[Video] How To Install Truphone

Check out Truphone @ www.truphone.com

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• ViaTalkFree : Free Calls within US and Canada
• Talkster : Free Long Distance Calling
• Ring2Skype: Receive Calls On Skype From Landline For Free
• PokeTalk: Free International Calling To 50+ Countries
• NimBuzz: IM and VoIP Client for Your Mobile

Features:

• Send group messages from instant messenger, email or mobile phone.
• Add contacts and create as many groups as you need.
• Manage and edit groups online.
• Group members are free to opt out from the froup at any time.
• IM support: At the moment Chatterous supports only GTalk.
• Coming soon: MSN, AIM and support for other instant messaging networks.
• Mobile Support: Works with US carriers only (AT&T, Verizon, Sprint, T-Mobile, Virgin and Alltel).
• It’s free

Check out Chatterous @ [ www.chatterous.com ]

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• BuddyStumbler: Meet New Friends Online For a Chat
• BigString: Virtual Instant Messenger and eMail Shredder
• Yeigo: VoIP and Instant Messaging for Your Mobile
• WeBuzz.im: Online Multi Client IM Service
• WatchItToo: View Photos & Watch Videos Together

Features

• Access MSN Meesenger, Google Talk / Jabber, Yahoo Messenger, and ICQ accounts at the same time.
• Set desired accounts to autologin on startup.
• Manage accounts: Add as many messenger accounts as you want.
• Manage contacts: add, remove and edit contacts.
• User account details and settings are stored locally, on your mobile.
• Works on most of the modern mobile phones.
• Multi-lingual

Check out JimmyIM @ jimmyim.berlios.de

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• Yeigo: VoIP and Instant Messaging for Your Mobile
• NimBuzz: IM and VoIP Client for Your Mobile
• Fring : Free Mobile Calling and Chat
• ZYB : BackUp Your Mobile Online
• YouMail : Store and Manage Voicemail Online

Yiego Feature List

• Make free mobile calls to other Yeigo users (note: depending on your mobile service plan data transfer fees may apply).
• Save up to 80% on all calls and up to 90% on text messaging fees to any mobile number worldwide.
• Chat with your contacts on GoogleTalk, MSN Messenger, Yahoo, AIM, ICQ and Jabber.
• Holler Feature: Tell any of your Yiego contacts (offline ones) that you are online and would like to chat to them.
• Minimal data usage: During an active call Yiego uses approximately 100 KB of data per minute. If you already know how much your provider charges for data usage then you can easily calculate Yiego usage costs here.
• Yiego works with 3G, HSDPA, GPRS, EDGE and Wi-Fi networks.
• Supports huge number of mobile handsets. You can see if your phone is supported from the homepage. For all unlucky ones there is Yiego Lite.

Check out Yiego @ www.yeigo.com [video demo]

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• Fring : Free Mobile Calling and Chat
• Switchboard : Browser-to-Browser Internet Phone
• NimBuzz: IM and VoIP Client for Your Mobile
• WeBuzz.im: Online Multi Client IM Service
• Vicito: Get Peronalised News in your Chat Program

MobiLuck – Feature List:

• Share your current location with your Mobiluck friends and Messenger contacts (MSN, GTalk, etc.).
• Receive alerts when one of your friends is in close proximity.
• Chat with MSN contacts right from your phone (coming soon: support for your Yahoo, AOL, Skype and GTalk contacts).
• See all nearby MobiLuck users. Send them messages and photos for free.
• Choose between different visibility options: 1.visible to everyone, 2. visible to friends only, and 3.invisible.
• Supports over 200 mobile phones. See if your phone is supported here.
• Available in English, French, Italian, Spanish, Deutsch, Chinese, Russian, and Arabic languages.
• Note: Mobiluck is a free service, but depending on your carrier plan data transfer charges may apply. For additional info go to Mobiluck FAQ page.

Check out MobiLuck @ www.mobiluck.com

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• Yeigo: VoIP and Instant Messaging for Your Mobile
• WatchItToo: View Photos & Watch Videos Together
• Trumpia: Last-Minute Event Planner
• Talkster : Free Long Distance Calling
• MoDazzle: Access Facebook Account via email or SMS

Feature Overview

• Make free phone calls directly from your browser .
• Call to landline, mobile (geo limitations apply) and other Flashphone users.
• Supports over 100 destinations worldwide. Mostly to landline numbers, but for few regions works for mobile numbers as well.
• Use Flashphone on mobile and Pocket PC devices. More details here.
• Temporaly: Currently call lengths are limited to 3 minutes, up-to 3 calls per day.

Check out Flashphone @ www.flashphone.ru

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• ViaTalkFree : Free Calls within US and Canada
• TruPhone: Make Free or Low-cost International Calls from Mobile
• Talkster : Free Long Distance Calling
• Ring2Skype: Receive Calls On Skype From Landline For Free
• PokeTalk: Free International Calling To 50+ Countries

Feature Overview

• Chat and Talk with Skype, Google Talk, MSN Messenger, ICQ, and Twitter contacts from your mobile for FREE.
• See status (online/ offline/ busy) for all your friends regardless of which IM / VoIP client they use.
• File Transfer: music, pictures, video clips, documents, etc.
• Make cheap local and international calls over the internet using your SkypeOut credits or any other popular SIP provider (GizmoProject, VoipCheap, VoipStunt, Free World DialUp, SIPNET and others).
• Keep automatic log of all outgoing and incoming Fring calls.
• Send free SMS ‘Join Fring’ invitations to friends.
• Works even without a SIM card. All you need is a public Wireless LAN hotspot.
• No geographical restrictions.
• Note: To use Fring your phone should be web-enabled. Although this is not a requirement if you’re in a public Wi-Fi hotspot.

How To: Free Mobile Calling with Fring

Twitter on Fring

How To: Make a SIP call using Fring

Check out Fring @ www.fring.com

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• Yeigo: VoIP and Instant Messaging for Your Mobile
• NimBuzz: IM and VoIP Client for Your Mobile
• IM-History : Store Your Chat History Online
• Dexrex: Store AIM, GTalk, MSN, Yahoo, Skype Chat History Online
• Talkster : Free Long Distance Calling

Feature Overview

• Make Cheap (in many cases FREE)landline/mobile calls.
• Use existing phone (mobile or landline) to make calls
• Free Global Calling (between JAJAH users): (a) To landline and mobile calls to/within the United States, Canada, China, Hong Kong and Singapore. (b) To landline calls to/within Australia, New Zealand, Taiwan, the UK, Germany, France, Italy and most other European nations. For calling other destinations see rates here.
• Nothing to download or install. Broadband connection is not a requirement either.
• Add JAJAH ‘Call Me’ buttons to your blog, email signature, etc.
• Schedule and initiate cheap conference calls with your friends and co-workers (see demo below).
• Got Questions ? Check out JAJAH faq page.

Jajah Tools

• Google Gadget: Access Jajah from your iGoogle page.
• Plaxo Outlook Toolbar: Call your address book contacts in one click.
• Mac OS X Address Book Plugin
• Firefox Extension: Converts every phone number on a website to ‘call now’ JAJAH links.
• JAJAH Outlook Plugin
• JAJAH Mobile Plugin: Install and Run JAJAH Mobile on your mobile phone.
• JAJAH Mobile Web (mobile.jajah.com): Access JAJAH from your mobile phone or PDA (see demo below).

CNN talks about JAJAH

Jajah Mobile Web

JAJAH Conference Calls

Check out JAJAH @ www.jajah.com

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• Talkster : Free Long Distance Calling
• NimBuzz: IM and VoIP Client for Your Mobile
• Jangl: Send Voicemail to Any Mobile via Email
• Fring : Free Mobile Calling and Chat
• All Free Calls : Free Unlimited International Calling

Nimbuzz Features

• Chat and Talk to friends from your mobile or PC.
• View and communicate with Skype, MSN (or Windows Live Messenger), Google Talk, AIM, and Yahoo contacts at the same time.
• Make free voice calls to GTalk and MSN contacts.
• Make international calls to/from 35 countries at local calling rates.
• Launch conference call and invite up to 4 people to join conversation.
• Group chats (up to 25 people) and send group messages.
• Run multiple chat sessions at the same time
• ‘The Buzz’ feature: invite friends to conversation at any time.
• and more…

Nimbuzz demo (mobile chat)

Nimbuzz demo (free international calling)

Check out Nimbuzz @ [www.nimbuzz.com]

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• LoudTalks : Cool Voice Messaging Tool
• Fring : Free Mobile Calling and Chat
• Yeigo: VoIP and Instant Messaging for Your Mobile
• Talkster : Free Long Distance Calling
• Jangl: Send Voicemail to Any Mobile via Email

Jangl: “…through a voicemail delivered by email, you and anyone you want to talk with, can be connected very quickly, via local phone numbers, even if your mobile phone isn’t allowed to dial International numbers. And, right now, it’s pretty much free. That’s pretty cool.”

Jangl Features

• Send free voicemail to anyone via email address.
• Call your Jangl contacts in over 30 countries and pay only local calling fees. You can use mobile or standard phone line.
• Contacts Call Routing: Forward contacts to Voicemail, or connect them directly to your Phone.
• Set custom call routing settings for each contact.
• Voicemail Notifications: Get voicemail alerts via email, or mobile text-messages (carrier charges may apply).
• Listen to your voicemails at Jangl’s website as well as all the other standard dialing options.
• Embed Jangl ‘Call Me’ widgets on your blog, website, or profile page (social, business, dating, etc.).
• Your phone number always remains secure and invisible to the caller.
• Block unwanted contacts.
• Note: Jangl Service is free while in beta. When calling from a mobile phone (regardless of destination) only local calling rates apply.
• More Questions? Check out Jangl FAQ page.

Jangl Widget (website, blog, profile, etc.)

Jangl Introduction

Go to Jangl [www.jangl.com]

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• Talkster : Free Long Distance Calling
• NimBuzz: IM and VoIP Client for Your Mobile
• JAJAH: Web Telephony On your Mobile/ Landline Phone
• Fring : Free Mobile Calling and Chat
• All Free Calls : Free Unlimited International Calling

from US (to around 50 countries): US users are limited to make free international calls to up-to 10 different phone numbers. Before you can get started you’ll need to register your phone number and indicate the numbers you are planning to call in the future. Once done, just dial Yak4Ever extension number, wait for the prompt, and dial full destination number (00 + country code + telephone number).

from UK (to over 50 countries): No restriction on the number of different phone numbers you can call. Just get AllFreeCalls access number and country codes.

• O2 Peak and Off-Peak users: Use free O2 minutes to make free calls to these countries by dialing 0844-8250055.
• Orange/T-Mobile Peak users: Use free Orange and T-mobile minutes to make free peak calls by dialing 0774-4787905
• Orange/T-Mobile Off-Peak users: access by dialin 0774-4787905

from Ireland (to over 40 countries): Same here, just get AllFreeCalls access number and country codes.

• Local Access: 1890 944 711
• National Access: 0818 272 970

Go to All Free Calls (Yak4Ever)

- from US: (http://www.yak4ever.com) NO LONGER ONLINE
- from UK: (http://www.allfreecalls.co.uk) NO LONGER ONLINE
- from Ireland: (http://www.allfreecalls.ie) NO LONGER ONLINE

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• Talkster : Free Long Distance Calling
• NimBuzz: IM and VoIP Client for Your Mobile
• Jangl: Send Voicemail to Any Mobile via Email
• JAJAH: Web Telephony On your Mobile/ Landline Phone
• Fring : Free Mobile Calling and Chat