Sponge is a Minecraft modding API implemented on top of Forge that can run vanilla clients as well as any mixture of plugins and mods. It combines the strengths of both server and client modding communities, allowing anyone to mod their game. Anyone who is interested can contribute to Sponge, and it is provided under the MIT license.
Article highlighting the top 10 Games APIs on ProgrammableWeb. The APIs that made it to our top 10 Games APIs list provide a wide range of capabilities including retrieving video game data, game monetization, video game streaming and recording, video game reviews, video game modding, and much more.