FamousFix - Formally known as WhosDatedWho
Listr - Listr lets you explore some of the best lists on Twitter, curated across your favorite categories.
Hvper - The Internet on one page. Successor of Popurls, the mother of news aggregators.
Refined Twitter - A browser extension that improves the Twitter experience
Rufus By Jtanza - Rufus is a free, open-source web based RSS reader, designed to be both simple and fast.
Blindfold - Make your life on Twitter more positive