Google Open Source - All of Googles open source projects under a single umbrella
SmallDevTools - Handy developer tools with a delightful interface
Opensource Builders - Find open-source alternatives to commercial apps
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
TextLab - TextLab is the fastest way to format, prettify, transform, hash, encode, and decode your data instantly!
Dev Lake - Dev Lake is a free & open source product analyzing & visualizing the data inside your dev tools, bringing the information you care about to one personalized & practical dashboard.