🤑 Indie game store🙌 Free games😂 Fun games😨 Horror games
👷 Game development🎨 Assets📚 Comics
🎉 Sales🎁 Bundles

There's the Tiled Manual, which you can contribute to by doing a pull request to the Tiled repository. While there is also a wiki on GitHub, it is mostly just used to document development-specific stuff.