OpenSSL source is maintained by a team of committers. The overall project is run by the OpenSSL Management Committee. We operate under a set of project bylaws and ask everyone to follow our code of conduct.
Here are some of the ways you can join the community and contribute; see the links on the right-hand side. The "getting started" page has some ideas. We maintain several mailing lists. Anyone can join, but you must be a member of a list to post to it. We have a public wiki, and anyone can request an account and start adding content. We have a team blog, where members of the development team will occasionally post.
While we only distribute source, some members of the community make binaries available.
Finally we'd also like to thank several groups for help with the project infrastructure over time.
If you think have found a security bug, please see our vulnerabilities page for information on how to report it.
To report a bug or make an enhancement request, please open an issue on GitHub, by clicking "new issue" on this page: https://github.com/openssl/openssl/issues. If you also have code, you do not need to open both an issue and a pull request.
For more information about the best way to submit patches, please see the file CONTRIBUTING in the distribution. The short answer is make a pull request.