Twitdom is an attempt to provide a consolidated view of all the applications developed for the Twitter ecosystem. It has been developed by Anuj Seth. Follow me on Twitter. This is to ensure that you can make the most effective use of the Twitter micro-blogging system. You can search for applications and submit new ones to the database as well.
Social Mention is a social media search engine that searches user-generated content such as blogs, comments, bookmarks, events, news, videos, and microblogging services.