No one here is interested in your Reddit community.

Concept of it sounds good. I don't think you're going to get a lot of love here by linking to Reddit and encouraging people to contribute there.

Have you considered aggregating and organizing this info and sharing it on a separate website? (Personally-owned) websites are underrated these days.

Here's my GitLab. None of it's "active" really. I'm the only contributor to most things I have on GitLab. At least some of the things there, if they started getting attention and interest, I might very likely make them active. But for now, they're just out there and may or may not receive further updates. Though I'm working on other projects I specifically intend to publish as FOSS in the future.

• Simple-CSS-Shrinker was made for a web-based game I wrote back in the day. I ought to dust that game off and publish it.
• JeSter, the JS tester. A really simple JS unit testing framework that runs in a browser and doesn't require Node or V8 or anything. Made in service to the same game I mentioned in the previous item.
• pystocking was basically in service of hydrogen_proxy
• hydrogen_proxy is a "scriptable HTTP proxy" written in Python. Definitely intended for privacy kind of applications. But it's kinda slow. I have in the back of my mind to rewrite it in Go, but it's not high on my priority list. (I'm honestly mulling the idea of quitting the use of browsers all together if I can wrangle a way to do that that doesn't involve switching to a bunch of proprietary software. The main browsers are bullshit these days.)
• GoVTT was written because I wanted to play a TTRPG with friends remotely. It's a web-based virtual tabletop application that you can self-host. I may some day offer hosting for it. (Like, if you want to use it but don't want to be bothered to go through the hassle of hosting it yourself, maybe I'll offer to host it for a small fee.) No guarantees, though, except that it'll always be FOSS and it'll always be an option to self-host.
• codecomic is a domain-specific language for making simple webcomics or story boards. I made it because I wanted to be able to include webcomics/story boards in my game mastering notes, which are managed with a system that I should also publish as FOSS.

My main side-projects right now that I haven't published yet are:

• A domain-specific language for building 3d game assets. Roughly speaking, FreeCAD is to OpenSCAD as Blender is to what I'm currently working on building. (It's in the early stages right now. I intend for it to be able to do modeling, rigging, animations, textures, normals, etc. All in the DSL's syntax. I'm making progress, but of course that project is ridiculously ambitious. We'll see where it is in a year.)
• A framework for rapidly prototyping 3d-printable mechanical keyboards. (Also pretty ridiculously ambitious.) The image below is a sneak peak at the first keyboard I'm intending to build with it. Some day.

I just released this little self host able social media platform

https://gitlab.com/here_forawhile/nanogram

Open-source software (FOSS preferred)

FYI, there isn't really such a thing as "OSS but not FOSS." The free software definition and the open source definition mostly overlap. Anything that is free software is almost always open source and vice versa.