Ruby Toolbox - Explore and compare open source Ruby libraries
Rage Grade by FullStory - Benchmark your customer frustration
AlternativeTo - AlternativeTo lets you find apps and software for Windows, Mac, Linux, iPhone, iPad, Android, Android Tablets, Web Apps, Online, Windows Tablets and more by recommending alternatives to apps you already know.
Shuffle for Bootstrap - Bootstrap drag and drop builder for busy developers.
UserBit - A full-stack qualitative research platform for UX & product teams.
Tailwind CSS - A utility-first CSS framework for rapidly building custom user interfaces.