In my quest to find the best Twitter Applications, I’ve found no better resource than oneforty.com. One Forty tracks, reviews and provides information on over 2000 Twitter Applications in 21 categories and 16 different platforms. Using this outstanding resource, please find the overall top 10 most popular Twitter applications.

10. Screenr (iPhone) – 5 rating, 116 reviews, used by 292 people

“Instant screencasts for Twitter. Now you can create screencasts for your followers as easily as you tweet. With Screenr’s web-based recorder, there’s nothing to download. Your screencasts play everywhere, even on iPhones. Record one now, it’s completely free! Try it now at http://screenr.com/“

9. TweetStats (Analytics) – 4.5 rating, 137 ratings, used by 931 people

“Graph your Twitter Stats including – tweets per hour, tweets per month, tweet timeline and reply statistics.”

8. Digsby (Facebook) – 4.5 rating, 180 reviews, used by 867 people

“A multiprotocol IM client that lets you manage all your IM, email, and social network accounts from one easy-to-use application. For IM, it brings all your buddies into one merged contact list with support for AIM, MSN, Facebook Chat, Yahoo, ICQ, GTalk, and Jabber. For email, it offers notifications of new emails with message previews, as well as, the ability to perform actions such as “Mark as Read” and “Delete” right from the notification with support for Gmail, Hotmail, Yahoo Mail, AOL/AIM Mail, POP, and IMAP. For social networks, it provides a newsfeed of events on the network and the ability to set status with support for Facebook, Twitter, and MySpace.”

7. Friend or Follow (Networking) – 4.5 rating, 349 reviews, used by 755 people

“Friend Or Follow helps you manage your Twitter contacts. Submit your Twitter screen name to find out who you’re following that’s not following you back, and who’s following you that you’re not following back.”

6. Brizzly (Web) – 4.5 rating, 107 reviews, used by 1,712 people

“Thing Labs’ new browser-based Twitter client allows you to use multiple accounts, monitor searches, share photos, save drafts, interact with Facebook and edit trending topics. It’s in public beta, but you can try Brizzly at http://brizzly.com!”

5. TweetDeck (AIR, Facebook) – 4 rating, 283 reviews, used by 7,129 people

TweetDeck is your personal browser for staying in touch with what’s happening now, connecting you with your contacts across Twitter, Facebook and more. TweetDeck shows you everything you want to see at once, so you can stay organized and up to date.”

4. HootSuite (Web) – 4.5 rating, 229 reviews, used by 2,250 people

“The professional Twitter client. Monitor keywords, manage multiple Twitter profiles, schedule tweets, and measure your success. We’re in free beta! HootSuite lets you manage your entire Twitter experience from one easy-to-use interface.”

3. Tweetie (iPhone) – 4.5 rating, 167 reviews, used by 3,974 people

“Tweetie is a fast, full-featured twitter client for iPhone and iPod touch. It offers everything you’d expect – from your timeline to trends – all with an incredibly polished user interface, fantastic performance, and unparalleled ease-of-use.”

2. TwitPic (Photo Sharing) – 4.5 rating, 204 reviews, used by 6,901 people

“Share photos on twitter by posting them to a site and tweeting a link to it.”

1. Bit.ly (URL Shortener) – 4.5 rating, 210 reviews, used by 2,469 people

“bit.ly allows users to shorten, share, and track links (URLs). Reducing the URL length makes sharing easier. bit.ly can be accessed through our website, bookmarklets and a robust and open API. bit.ly is also integrated into several popular third-party tools such as Tweetdeck. A more full list of third party tools can be found on the bit.ly blog. Unique user-level and aggregate links are created, allowing users to view complete, real-time traffic and referrer data, as well as location and metadata. Tracking stats are available after users shorten their long links with bit.ly by clicking on the “Info+” link on bit.ly, or just adding a “+” sign to the end of any bit.ly link (for example, http://bit.ly/n0og+).”