OneBody is Open-Source Software. It’s code is readily available for anyone to use, look at, play with, modify, etc., and it’s development model is just as open.
You can browse the code for OneBody over at GitHub.
Contributors are welcome! Learn how to help.
Several people (and the list is growing!) have donated their time and effort to the project, so that communities all over the world can have the benefits of a complete, stable platform for building community, sharing information, and tracking membership, for as little cost as possible.*
If you're comfortable running your own Linux server, you can download the software here.
Follow along with recent changes to OneBody by viewing the commit log.
*Even being completely free software, there are still costs associated with running your own server.