TechCoop-Investigate FramaSoft
FramaSoft - you can't miss em, just search. They host a ton of free-software services for anyone that doesn't want to self-host, but use the best FLOSS and non-corporate-hosted tools. A great option, IMO. They are French though, which I only mention as there may be limited language barriers to working with them (there are English versions of most things they have).