Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Mochi - Write notes and flashcards with Markdown and study them with spaced repetition.
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Zorbi - Spaced-Repetition Flashcards - Other tools are built by boomers, Zorbi is built by students.
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.
Yak Tack - remember. words.