Ecosyste.ms: OpenCollective

An open API service for software projects hosted on Open Collective.

tModLoader

tModLoader is an API for Terraria that provides a way to create and load mods without having to work with Terraria's source code directly.
Collective - Host: opensource - https://opencollective.com/tmodloader - Website: https://www.tmodloader.net/ - Code: https://github.com/tModLoader