GML Script Wizard
Quickly write GML script boilerplate code and documentation
SnapGML
Scratch-like GameMaker Language visual coding
Tile Crusher
A small utility to work with spritesheets and tilesheets. Easily split or combine images
Picross Canvas
Pixel Art and Animation Suite
Xin 1.1 debug demo
Game Maker 8.0 extension debug demo
Custom Keyboard - GameMaker Source Code
Source code custom keyboard for web exports
RayCoaster
Raycaster in C, easy fun.
StoryFlow Easy: Visual Novel Editor
French, English, Spanish, Russian, Italian, Chinese
TheMemer
GMC Jam Theme Solver
GMStruct
Generate Structs for GameMaker studio 2
midiranger
easily and simply create soundtracks for your games!
Merchant System for RPG in a Box
A merchant/shop system for RPG in a Box.
Code-to-Bot for Gamemaker: Studio
Converts comments from Gamemaker Projects to be used in cheapbotsdonequick.com Twitter-bots.
CastleDB Cleaner
A single python script that converts CastleDB .cdb file to an easier to use JSON file
DAPPLE
A Simple Game Engine For Beginners and Prototypes.
Noted GML
A free automated JSDoc generator for GameMaker
SpellSide
The new engine. The most powerful and easiest.
Orbis Basic
A retro-futuristic BASIC runtime for terminal graphics, atmospheric rendering and creative coding experiments.
turtleSpaces 3D Logo Game Engine
Easily develop 3D games, animations and more using turtleSpaces, a Logo-based development platform