

I tested out v0.3 mid last year.
Essentially the store contains all games the admin has setup on the server. A user then subscribes to a game from the store, which adds it to their library, ready for download. There’s no transaction or anything like that.
Store probably isn’t the best terminology to use, but I guess they’re trying to mirror steam as closely as possible for adoption purposes.

Tesseract! (/s)
Seriously though, these look great. if you’re looking for more ideas some additional open source apps I regularly use are (links are to the logos):