WHATWG maintains several standards that are core to the web platform.
- Standards: https://spec.whatwg.org/
- GitHub: https://github.com/whatwg
- Chat: https://whatwg.org/chat
- Twitter: https://twitter.com/whatwg
Everyone is welcome to contribute to the WHATWG.
If you want to create a pull request and have a contractual relationship with Mozilla, see the GitHub IPR Organization page for more information on how to go about that. (Do not worry, you can also follow a proud tradition of creating the pull request first and sorting this out afterwards.)