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Games like Allow Data URI

A 2D Character Portrait Generator.
Easily create 3D models and 2D sprites
fantasy assets
Livecoding for GameMaker: Studio / GameMaker Studio 2
Better and safer JSON functions.
GMS 2 tool for viewing 360° textures.
Open new tabs and perform other actions that require JS-level events in GM' web games.
Geon FX
Simply stunning Particle Editor for GameMaker Studio 1-2 with a PNG and GIF Export
A branching dialogue editor for game developers. Can be used with any game engine / framework​.
Make Zip archives from GM games
a collection of pixel fonts
8Bit / PixelArt converter for sprites & videos
Design pixelart effects and render them to .png sprite sheets or .gifs.
20,000+ game assets for use in your games!
Text/image pasting for GameMaker games on HTML5 target
Embed a full web browser in your game
Execute code snippets in your GameMaker games