Users may also browse flashcards shared by others by a subject or search using relevant keywords. Furthermore, flashcards can be saved to favorites for later reference.

Features:

• Create and share interactive flash cards for studying.
• Share your flashcard sets with others.
• Browse flashcards created by others, by subjects or search with keywords.
• Over 75,000 public flashcard sets.
• View printer-friendly HTML version of your flashcard sets or export them to your iPod.
• Free, sign up to get started.
• Similar tools: CoboCards, Cramberry and FlashCardDB.

Check out Flash Card Machine @ www.flashcardmachine.com

• New: Follow MakeUseOf on Twitter. Recommended!
• MakeUseOf 'Geeky Fun' - Hillarious Geeky Pics and Videos from different parts of web.

• Popling: Learn Languages Online The Easy Way
• FlashCardDB – Online Flash Card Maker
• Cramberry: Cool Online Flashcard Generator
• Wowbrary: Get Alerts on New Book Arrivals From Your Library
• WiZiQ : Virtual Classroom

Additionaly, you can edit flash cards as many times as you want and go back to previous versions. CoboCards also provides features like posting comments on the cards, setting deadlines, tracking your progress, collaborating with fellow students and sorting the card deck by dragging & dropping cards.

Features:

• Create your own flashcards online free.
• Include pictures and graphs on your card.
• Get RSS updates when a team member edits the cards.
• Link cards to each other electronically.
• Keyboard Shortcuts for easy editing.
• Similar websites: Cramberry, Popling, FlashCardFlash and FlashCardDB.

Check out CoboCards @ www.cobocards.com (by Tehseen from Ijaar.com)

• New: Follow MakeUseOf on Twitter. Recommended!
• MakeUseOf 'Geeky Fun' - Hillarious Geeky Pics and Videos from different parts of web.

• Popling: Learn Languages Online The Easy Way
• FlashCardFlash: Search 6 Best Flashcard Websites At Once
• FlashCardDB – Online Flash Card Maker
• Flash Card Machine: Create & Share Study Flash Cards
• Cramberry: Cool Online Flashcard Generator

GotFreeCards is the quick, hassle-free way to send animated ecards to a loved one, coworker or friend, whether for a special occasion or just to say hello! It provides you with free animated ecards for Birthday, Mother’s Day, Get Well Soon, Holiday, Friendship etc. You can customize the ecards by adding an image or by uploading music to give it a personal touch.

In order to send a free ecard:

1. Select a card that suits your style, browse by occasion category and click on the “E-mail this card” button.

2. Add recipient name and e-mail address, then personalize your card with a special message, photo or song.

3. When completed click “Send this card”.

The site also has Printable Cards and Event Reminders sections.

Printable Cards segment allows you to design your own card and print it out. It provides you with a template, to which you can upload a photo or choose one of the many images available on the site. You can also add your own personal note or choose from among the many message options available.

Event Reminders section lets you set alerts with the event details and get reminded by email for free.

Features:

• Send animated ecards for free.
• Customize the ecards by adding an image or uploading music.
• Option to review a card after it’s been sent.
• Includes event reminders and printable cards.
• Free, No registration required.

Check out GotFreeCards @ www.got-free-ecards.com (by Srikanth AD from Techonaut)

• New: Follow MakeUseOf on Twitter. Recommended!
• MakeUseOf 'Geeky Fun' - Hillarious Geeky Pics and Videos from different parts of web.

• Flowers2Mail: Send A Virtual Greeting With A Flower Bouquet
• VoxCard: Send Cards With Your Voice Greetings
• PenCake: Draw And Send eCards
• FlyGreetings: Stylish, Quality Designer e-Cards
• BirthdayDialer: Send Free Singing Birthday Telegrams By Phone

The search results interafce is very similar to what you get on Google. The only difference is that results will be pulled only from the 6 above mentioned flashcard websites.

Features:

• Search on six main flashcard sites simultaneously.
• More flashcard related sites: Cramberry, Popling and FlashCardDB.

Check out FlashCardFlash @ www.flashcardflash.com

• New: Follow MakeUseOf on Twitter. Recommended!
• MakeUseOf 'Geeky Fun' - Hillarious Geeky Pics and Videos from different parts of web.

• Popling: Learn Languages Online The Easy Way
• GrubHub: Food Delivery Search Engine
• FlashCardDB – Online Flash Card Maker
• Flash Card Machine: Create & Share Study Flash Cards
• Cramberry: Cool Online Flashcard Generator

To create a flashcard, simply enter front and back text into provided fields, the question being as front and the correct answer as back text.  Once cards are finished you can run a quiz and test your self, one of the cool things is that cards that you fail to answer correctly will be shown more frequently, thus, you get more practice on that particular card.

Features:

• Create flashcards online.
• Create as many cards as you want.
• Share your cards with other Cramberry users.
• User friendly and clutter free interface.
• Similar websites: FlashCardDB and Popling.

Check out Cramberry @ www.cramberry.net (via downloadsquad.com)

• New: Follow MakeUseOf on Twitter. Recommended!
• MakeUseOf 'Geeky Fun' - Hillarious Geeky Pics and Videos from different parts of web.

• Popling: Learn Languages Online The Easy Way
• FlashCardDB – Online Flash Card Maker
• Flash Card Machine: Create & Share Study Flash Cards
• Wowbrary: Get Alerts on New Book Arrivals From Your Library
• WiZiQ : Virtual Classroom

The application focuses on passive learning and lets you get familiar with vocabulary without too much effort. It shows you a flash card every few minutes (you decide how often) through an unobtrusive notification window. If you aren’t busy, click the notification to answer the question on the flash card.
Otheriwse you may gnore it and it will disappear shortly after. 

Once you have answered the card, click ‘Hide’ to put the application away until it’s time to pop again. This way you can passively learn just about anything. It works in particularly well for learning languages online.

The site also provides you over 10.000 flash cards from various topics like: Spanish, French, German, Japanese, Italian, Portuguese, Indonesian, Chemistry, Geography and more.

Users may also make their own flash card sets on any desired topic.

For more info watch the demo video below:

Check out Popling @ www.popling.net

• New: Follow MakeUseOf on Twitter. Recommended!
• MakeUseOf 'Geeky Fun' - Hillarious Geeky Pics and Videos from different parts of web.

• WiZiQ : Virtual Classroom
• VocabSushi: The Easy Way To Build Your Vocabulary
• ListenAndWrite: Online Audio Dictation
• FlashCardDB – Online Flash Card Maker
• Flash Card Machine: Create & Share Study Flash Cards

When you visit the site, you will see the bouquet in the middle with the flowers on the left. You can choose the bouquet and its color and also choose from a wide range of flowers to drag an drop into the bouquet. Here’s a sample bouquet which I created.

I sent the bouquet to myself and received the email almost immediately. The email had a link, which when clicked took me to the page which had the bouquet plus the greeting card (a tag rather) hanging onto it.

Hence it’s a hassle free, fun tool to send quick greetings.

Check out Flowers2mail @ www.flowers2mail.com ( Contributed by Abhijeet from Jeet Blog )

• New: Follow MakeUseOf on Twitter. Recommended!
• MakeUseOf 'Geeky Fun' - Hillarious Geeky Pics and Videos from different parts of web.

• VoxCard: Send Cards With Your Voice Greetings
• GotFreeCards: Free Animated Ecards, Event Reminders and Printable Cards
• FlyGreetings: Stylish, Quality Designer e-Cards
• PigSpigot: Online Greeting Card Designer
• PenCake: Draw And Send eCards

• Create and store flash cards in your account.
• Search or browse flash cards created by others (by tags / recently created / recently studied).
• Organize flash cards using tags.
• Study Room: study flash cards in random mode, keep track of correct/incorrect answers, etc.

Check out FlashCardDB @ www.flashcarddb.com

• New: Follow MakeUseOf on Twitter. Recommended!
• MakeUseOf 'Geeky Fun' - Hillarious Geeky Pics and Videos from different parts of web.

• Popling: Learn Languages Online The Easy Way
• Flash Card Machine: Create & Share Study Flash Cards
• Cramberry: Cool Online Flashcard Generator
• Wowbrary: Get Alerts on New Book Arrivals From Your Library
• WiZiQ : Virtual Classroom