SpriteSource

The Stitch for VSCode extension provides code editing features like go-to-definition for GameMaker projects, enhancing the coding experience in a widely-used editor, as detailed in the README.

Libraries like GML Parser and Stitch YY allow reading, validating, and manipulating GameMaker's .yy and .yyp files, enabling custom automation and tooling beyond the IDE's capabilities.

Sprite Source library offers batch preparation of images for GameMaker sprites, streamlining art import workflows, which is built into VSCode or available standalone via npm.

Built by Butterscotch Shenanigans for their own GameMaker studio, ensuring tools solve real-world development problems, as noted in the philosophy section.