Contribute to Open Source, donate bitcoins to open source projects or make commits and get tips for it. How does it work? People donate bitcoins to projects. When someone's commit is accepted into the project repository, we automatically tip the author. Donate Find a project you like and deposit bitcoins into it. Your donation will be accumulated with the funds of other donators to give as tips for new commits. Contribute Go and fix something! If your commit is accepted by the project maintainer, you will get a tip! Just check your email for an invitation or Sign in. If you have not yet received an invitation, you can Sign up with a valid email address or via GitHub.