Everything you'll ever need to know about contributing or maintaining to an open source project - this guide greatly done by GitHub. Not directly related to WordPress but if you're an WordPress plugin/theme author- give it a read.
Open source software is made by people just like you. Learn how to launch and grow your project. Want to contribute to open source? A guide to making open source contributions, for first-timers and for veterans.
Building a community that encourages people to use, contribute to, and evangelize your project.
Making your life easier as an open source maintainer, from documenting processes to leveraging your community.
Everything you've ever wondered about the legal side of open source, and a few things you didn't.
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