Refined Twitter - A browser extension that improves the Twitter experience
LibHunt - LibHunt tracks mentions of software libraries on relevant social networks. Based on that data, you can find the most popular projects and their alternatives.
Nofanity - Nofanity removes swear words from YouTube videos
Ruby Toolbox - Explore and compare open source Ruby libraries
Detox for Facebook - Replace your Facebook feed with PH, HN, DN and more.
GitNews Web - Trending repositories from GitHub, HackerNews & Reddit