I've started a list of free/libre projects for AGS using the awesome (https://github.com/sindresorhus/awesome/blob/main/awesome.md) guidelines. Many other projects use this, and it increases visibility for developers looking for add-ons and the goal is to provide visibility for public AGS projects.
https://github.com/agscommunity/awesome-ags
Modules, Plugins, Tools, Templates, etc. authors: I NEED YOUR HELP! If you want to share your projects on the list, please create a pull request, and I'd be happy to merge it in.
There's a sticky list of open source games:
https://www.adventuregamestudio.co.uk/forums/advanced-technical-forum/a-sticky-list-with-open-source-ags-games/