Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Softorino YouTube Converter - Download YouTube video & audio. Watch and listen offline
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Yout - YouTube to Mp3 Converter
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.
You-Get - Command-line utility to download media contents from the web