Sparkle is a modding system for Snap!, Jameson, and Snavanced! (with more languages on the way!). It's a fork of the Crackle extension designed to speed up development and improve the overall user experience.
More stuff coming soon!
For the latest known-good version of Sparkle (not a guarantee!), use the main branch; for the development version that's chronically broken, use the unstable branch. Use both at your own risk!