I am starting to get annoyed by Lemmy's Active and Hot feeds recommending not things that are Hot or Active but instead threads from over a year ago with ONE new comment

Codeberg is wonderful and also really easy to switch to from Github, as it has nice migration features.

Gitea! https://gitea.com/

Been using self hosted for about 2 years now, it's light weight and low maintenance!

Self-hosted Gitlab.

Probably GitLab

@Icarus You lookin for somethin to use, or run yerself?

I use gitea.

Edit: remove bitbucket which is not open source.

Lots of people say Sourcehut, and I agree. It may not always be free, but I believe it's still free for OSS projects. All of the sourcecode is available, and the instructions for running your own servers is decent. It's been around for years, and I'd be surprised if it went down; it's never had an outage as long as I've been using it.

It has source repos, issue tracking, CI, mailing lists, and wikis. The pages are also lightweight, with little to no javascript.

You might find it ugly. It has no web-based PR/merge tooling (but has instructions on how to manage PR/merging using the mailing lists). It has a couple of restrictions on what kinds of projects you can host with gem (no cryptocurrency projects). It's a developer's tool, and built for people who have a fair amount of competency outside of web interfaces.

I love Sourcehut; I've been paying for it since before I needed to, and even though I'm not using it for commercial purposes... but it's not for everyone.