Shuffle for Bootstrap - Bootstrap drag and drop builder for busy developers.
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
Rage Grade by FullStory - Benchmark your customer frustration
whatdevsneed - This is whatdevsneed.
Timeline.io - Visual collaboration tools for devs, designers, and clients.
SmallDevTools - Handy developer tools with a delightful interface