Booster’s Lab

“I’m pretty sure that, with this … release [4.2.0], Booster’s Lab is the definitive Cave Story editor now. There’s really no reason to use any other editor for modding.” - GirakaCHEEZER

Booster’s Lab is a Java-based cross-platform Cave Story editor created by Noxid. Currently, it is the most recommended editor due to its stability, range of features and multi-engine compatibility.

The 'main menu' screen as seen when first starting Booster's Lab. No project is loaded.

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Trivia

This editor has over 10,000 lines of code.
Sprites from Noxid’s parody of Pixel’s ‘100 Cats’ appear in the various menus.
This is the most complete editor for Cave Story to date.