Top 6 modding-library open source projects

Adds modding components to RimWorld: vehicles, spell casting, weapon slots, oversized weapons, and more!

A complete Subnautica and Subnautica: Below Zero modding library for the popular QModManager framework.

Havok format library

The mod loader and mod framework for Outer Wilds

Next generation modding platform for Final Fantasy VII and Final Fantasy VIII ( with native Steam 2013 release support! )

A work-in-progress modding tool geared toward UNDERTALE/DELTARUNE