With more than 15 million monthly pageviews, Mashable is the most prolific blog reviewing new Web sites and services, publishing breaking news on the web and offering social media resources and guides.

Mashable uses the TLISTS API to provide their users with an enhanced Twitter Guide and List discovery service. This includes:

• a search engine of more than a half-million lists
• a directory of 35,000 top Lists
• a TLISTS-powered superlist for each category
• tag-clouds for every List and listed Tweeter
• featured channels of Lists on topical subjects

TweetDeck is the world's most popular Twitter app. It is a personal browser for staying in touch with what's happening now, connecting with contacts across Twitter, Facebook and more.

TweetDeck uses the TLISTS API to offer their users the definitive List discovery service. This includes:

• a search engine of more than a half-million Lists
• a directory of 35,000 top Lists
• tag-clouds for every List and listed Tweeter
• featured channels of Lists on topical subjects
• (for list curators) constantly updated recommendations of new Tweeters to add to their Lists

Twittelator is a leading Twitter client for the iPhone/Touch that you can download from the App Store and use to begin following people and posting Tweets, maps and photos.

Twittelator uses the TLISTS API to enable search and browsing of Lists right within the iPhone app. This includes:

• a search engine of all 250,000 Lists and 5,000,000 listed Tweeters
• an editorially selected line-up of featured Lists
• a 'feeling lucky' feature that randomly suggests interesting Lists

UberTwitter is the leading BlackBerry Twitter app. UberTwitter combines a simple interface and sleek design to be accessible to the high achieving and influential BlackBerry user community. Coming soon.

SocialScope pulls together all your real-time social media sources into one intelligently filtered stream. Using advanced machine learning algorithms, SocialScope customizes the information users see to provide them with the best possible personalized news experience. Coming in April 2010.

Gravity is the first fully-featured and native Twitter client for the S60 platform. It supports multiple accounts, Twitter Search, Laconica, Ping.fm, posting of pictures via MobyPicture & TwitPic and wraps everything into a gorgeous looking interface. TLISTS integration coming soon.

TweetTV is a new Twitter app fully dedicated to providing the Channel viewing experience to first- time and mainstream Twitter users. Users turn on TweetTV and get instant access to top quality Channel content.