I'm particularly interested in projects that have a net positive impact on the world. Be it environmental, social, or otherwise.
I'm hoping the community here could provide some recommendations. My background is primarily web dev, but don't limit your suggestions to that domain, I'm always happy for an excuse to learn a new language/domain.
Thanks in advance!
https://github.com/openstreetmap/openstreetmap-website/ is Ruby on Rails (easy installable with a docker setup). The maintainers have trouble even reviewing incoming PRs so an experienced person who can triage, test, review is currently needed.
If you're in the US then https://en.wikipedia.org/wiki/Code_for_America might be worth having a look at.
https://summerofcode.withgoogle.com/ will soon annouce vetted organizations who do open source. (last year https://summerofcode.withgoogle.com/programs/2023/organizati...). Project are paid, the process is long though, all summer. https://developers.google.com/open-source/gsoc/timeline