Selfhosted

Basically as the title says.

I'd like to know what is there on selfhosted solutions if people are using any, to keep tabs on stuff for managing projects. But - here's the thing, I want a thing to help take notes, not a thing that's gonna "make decisions" / "suggest a business plan".

So, basically I'm looking for something self-hosted that incorporates things like (manual!) man-hours tracking, gantt charts, kanban and other organizative diagrams, general (ie.: not "code-oriented") issue tracker.

Ideally to be deployed as an assiatnce to keep track of stuff on a small shop operating a force of 8~12 devs. Me and one other person want to help shield our devs from clients as the company is starying to grow more, enough that asking the devs for hard data on how they are managing themselves (to know if there's room for another project or if overtime is needed, for example) is starting to deprive them of actual devel time. We want to avoid reaching the stage of meetings that could have been emails.

Thanks in advance. Suggestions are welcome, we do have enough time to test a few alternatives before settling on one we just don't know what exists out there that is not "sign in on Github".