GitNews Web - Trending repositories from GitHub, HackerNews & Reddit
ScrollMagic - The jQuery plugin for magical scroll interactions.
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.
WOW.js - Animate elements on-scroll to catch attention. Such Magic.
Ruby Toolbox - Explore and compare open source Ruby libraries
Lax.js - Create beautiful & smooth animations when you scroll