Ruby for Good is a yearly event in the DC metro area for Ruby programmers from all over the globe get together over a long weekend to build projects that help communities. Participants stay in dorms with hacking and socializing takes place in communal areas.
You can volunteer by attending the event or becoming a team lead. There are also opportunities to sponsor the event. Note: this is not a hackathon.
In 2019, Ruby for Good was held at George Mason University. Future locations have not been announced as of the making of this page. However, the West Coast event is up. You can check it out here: https://rubybythebay.org/
Ruby for Good is an annual DC area event for Ruby programmers from all over the globe to get together over a long weekend to build projects that help out communities. Lots of organizations need the sort of technical help they can provide but are unable to afford it. They want to be the do-gooders that volunteer to solve non-profit business and technical problems.