It's been four months since our first Gmail Roundup. And Gmail being as popular as it is, it's time for a major update. So here you go, over 80 Gmail tools and tips, including Firefox extensions, Greasemonkey scripts, Desktop programs, Web applications and all-purpose 'HowTo' guides.

Firefox EXTENSIONS

Gmail Manager - manage multiple Gmail accounts, receive new mail notifications, view unread messages right from your browser statusbar. "...The Gmail Manager Firefox add-on obviates the need to keep your Gmail open in a tab all the time by displaying your email info in a statusbar pop-up..." [via LifeHacker]

GmailThis - excellent browser bookmarklet that lets you quickly forward highlighted text on any webpage via Gmail.

Better Gmail - integrates features of 10 Greasemonkey scripts into one firefox addon. These include: Google Reader integration, Mac-like skin, GCal integration, Fixed font and more.

GmailSkinz - powerful firefox addon with lots of cool features: change Inbox color , Add Google IG modules, insert images from Picasa albums, insert smileys, make navigation menu horizontal, hide unnecessary page elements, and more. (Note: some users reported having problems with this addon).

CustomizeGoogle - removes ads, switches you from http to https, hides the spam counter, quick contacts box, invite box and forces fixed font

[NO LONGER WORKS] Gspace - multi-platform firefox addon that turns your Gmail account into powerful online storage tool.

Gmail Search - search your Gmail account directly from the firefox search bar.

GcalQuickTab - toggle between Gmail and Google Calendar with keyboard shortcuts.

GTDInbox - turns your account into flexible and feature-loaded ToDo-management service (GTD = Getting Things Done)

DragDropUpload - this handy extension lets you quickly attach one or more files to your emails by dragging them over the "Attach a file" link.

Google Toolbar - official Google toolbar featuring one-click Gmail messages search.

FireGPG - integrates contextual menu with some useful functions: encrypt, decrypt, sign, etc. Read more on how to use it here [Broken URL Removed].

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GreaseMonkey SCRIPTS (What is Greaseamonkey?)

gmail greasemonkey scripts

(click to enlarge)

Gmail Super Clean - clean and distraction-free Gmail. Looks great, check it out here

Gmail Spam-count Hide - hides spam count link.

Google Reader Folders - adds a little box that lists the folders on Google Reader along with the number of unread items in each one.

Google Reader Integration - complete integration of GReader into Gmail. Excellent! (view). Jump to Google Reader Tools and Tips.

Google Calendar Integration - integrates GCal agenda into Gmail (view). Jump to Google Calendar Tools and Tips.

Conversation Preview - lets you quickly preview message contents right from the main inbox window (view).

Saved Searches - create 'saved searches' (aka smart folders) and display them in the separate box in the navigation menu. Clicking on a search executes the saved query (view).

Folders4Gmail - allows you to create nested labels (i.e. labels and sub-labels) [via LifeHacker].

Gmail Date Search - adds a 'Search by Date' button to Gmail's search form.

Label Colors [No Longer Available] - color menu labels to make them stand out better (view).

GMail Attachment Icons - adds attachment icons to emails, letting you see what kind of attachment an email has (HTML ,JPG, PDF....). Note: 'Attachment icons' isn't a standard Greasemonkey script, it's an addon for a similar Firefox extension known as Stylish. However it should work with Geasemonkey as well.

GmailTo - forces all 'mailto' links to open in GMail.

Fixed Font Toggle [No Longer Available] - adds a font toggle button so that messages can be viewed in a fixed-width font. Read more ...

Gmail Macros - adds extra keyboard shortcuts to Gmail (i.e. "t" for move to trash, "r" for mark as read, "p'' for mark as read and add to archive...etc). Read more...

Gmail Encrypt - encrypts your messages to prevent unwanted people from reading it. Just in case someone intercepts it while it's on the way.

SSLGoogle - forces Gmail, Google Docs and GCale pages and their intra-links to open via secure connection (HTTPS).

Signature Float - moves your email signature to the top of the message rather than the bottom.

Attachment reminder - reminds you to attach a file to your Gmail, based on whether you have the word attach (ed, ment, etc) in the body.

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Desktop Programs and Web Apps

GmailDrive (Win) - adds a new virtual drive ('Gmail Drive') to 'My Computer' folder. Drag'n drop files on top it to store them in your Gmail account.

gDisk (Mac) - Mac alternative for the above mentioned GmailDrive.

Gmail ToDo - handy desktop application that allows you to quickly add and save todo's in a 'ToDo' label in your Gmail account.

FlipMail - free service for forwarding some/all of your emails to your mobile (US Only).

Gmail Loader - cross-platform (Win, Mac, Linux) tool to help you load all your old message archives from other email accounts into Gmail. [via LifeHacker].

Icon Generator - minimize spam exposure by getting an image for your email address and safely publish it wherever needed.

Blogsigs - lets you auto-include the title of your latest blog post in your email signature. Works with Gmail.

GMail Mobile - access Gmail from your mobile.

Google Talk - Google's IM service which is fully integrable with GMail.

You've Got Gmail [No Longer Available] - Gmail plugin for Trillian (IM client)

Unbl0ck - web-based proxy for accessing Gmail from places where it's blocked (work, school,...)

iPhoto2Gmail (Mac) - allows you to instantly email images from within iPhoto. Send either original or optimized (resized) image versions.

MailPlane - "...A full fledged mail client for Google Mail and Mac OS X ". Mail client combining best of Gmail with Mac's simplicity anduser interface. It's still in beta though, but you can request invite from here.

GmailFS - mountable Linux filesystem which uses Gmail as its storage medium

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GMail Notifiers

- for Windows: GMail Notifier (official), GTray, Notifier2

- for Mac: GMail Notifier (official), GCount, Gmail+Growl 2.0

- for Linux: KCheckGmail

- for Firefox: E-Mail Notifier Toolbar, Gmail Notifier

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GMail HowTo's (over 20 all purpose HowTo guides)

HowTo: Build advanced Gmail filters and persistent searches.

HowTo: (broken link removed) Import your archived emails into Gmail.

HowTo: Access Gmail account of someone who dies.

HowTo: Force Gmail notifier to use SSL (instead of HTTP).

HowTo: Import contacts from Hotmail to Gmail.

HowTo: Redownload Gmail messages into outlook.

HowTo: Backup your Gmail messages using Google Groups.

HowTo: Create Google Calendar events from Gmai.

HowTo: Set Gmail as default mail client in Ubuntu (without any additional software).

HowTo: Sync. Google Calendar and Gmail contacts to your desktop.

HowTo: Use rich HTML email signatures straight from Gmail (req. Better Gmail extension).

HowTo: Manage all your email account with Gmail. (Excellent guide for folks with several emails.)

HowTo: Back up Gmail with Fetchmail (Windows).

HowTo: Configure and access Gmail on Mozilla Thunderbird.

HowTo: Use Gmail over IMAP and tag your mail, too.

HowTo: Sync. Micr. Outlook, GCal, Gmail, iPod, and mobile phone.

HowTo: Encrypt and sign Gmail messages using FireGPG extension (see above).

HowTo: Work with Gmail Attachments like a PRO.

HowTo: Attach and send blocked file types, i.e. '*.exe'.

HowTo: Find that 'someone' who gives away your email address to spammers.

HowTo: Gmail on Home Linux Box using Postfix and Fetchmail.

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Gmail Shortcuts

- Secret keyboard shortcut for deleting messages [labnol.blogspot.com]

- Shortcuts for Special Gmail Labels [googlesystem.blogspot.com] - for ultra quick navigation

- Gmail Shortcut List: handy, printable list of keyboard shortcuts for the Gmail [comp.nus.edu.sg]

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Tips

- Three solid Gmail productivity tips [mattcutts.com]

- What to do if your Gmail is nearly full [bnura.blogspot.com]

- Jim'sTips: huge collection of basic gmail tips [g04.com]