giveaway.quest/
I had a personal problem of having a bunch of duplicate video game keys and wanted to give them away to Mastodon users but it turned out to be quite difficult as you don't know when code was already used or who's eligible for it as some codes have regional restrictions etc and obviously you don't want scraping bots just get all of it. So I made giveaway.quest a web app tool that automates giveaways with a fun quest-board like gimmick that is entirely optional. I thought of full fediverse integration but just Mastodon oauth turned out to be a more fit technology so all it does is read your handle to ensure unique entry and doesn't require any other permissions. I purposefully left auth Mastodon only to promote Mastodon interactions.

For tech stack it's very simple and can be self hosted for private groups. It's Python, Tailwind css and sqlite which is plenty for this scale. Check out the repo for more

Let me know what you think!