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.
Toole - Search for and discover online tools
Ruby Toolbox - Explore and compare open source Ruby libraries
Rage Grade by FullStory - Benchmark your customer frustration
GitNews Web - Trending repositories from GitHub, HackerNews & Reddit
F*** You Pay Me (Beta) - Made by influencers, for influencers.