tutoit.io - Create an in-app measurable tutorial with a single click
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
DebateArt.com - DebateArt is a unique and growing community committed to the idea of exchanging views and perspectives through debating.
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Kialo - Kialo is the platform for rational debate. Empowering reason through friendly and open discussions.
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.