GameMakerStudio

bktGlitch

A glitch shader for GameMaker: Studio.

odditica

Space Combat Engine

3€

Space Combat Engine for GMS 2

Vincent

GM Lighting Editor

Lighting Editor to create a lighting engine for GMS

Lukas VanTilburg

All-in-One Camera for Gamemaker

$4.99

A GamemakerStudio Camera solution

GMS2 Resource Importer

Conveniently transfer resources between GameMaker Studio 2 projects.

GamePhase

Facebook Instant Games + ADS for GameMakerStudio 1 - 2

Platforming Engine

12.50€

Create your platformer!

Rob van Saaze

$9.99

Agrega tus juegos html5 a facebook messenger + ads

OnzaEstudio

DerekWTF says

facebook instant game extension.

Instance Flags

Bit flag based instance filtering for GameMaker

Scripts for Gamemaker

A compilation of useful scripts

Roguelight lighting in Gamemaker

Lighting used in Daniel Linssen's RogueLight. Make in Gamemaker Studio 1.4.

Simple Pause Menu for Gamemaker

A Pause Menu using one object

Chromium browser in GameMaker

Embed a full web browser in your game

meseta

Lockstep Rollback Netcode Demo for GameMaker

A deterministic lockstep implementation with input delay and rollback GameMaker Studio 2

meseta

file_ensure for GameMaker

Fixes the stall on first file read attempt in GameMaker HTML5 games

DerekWTF says

快速读取和创建文件。例如判断是否存在指定名字的INI文件，没有的话立即创建，比iniopen要快。

Steamworks.gml example

Sample project for Steam-based networking for GameMaker.

DerekWTF says

基于steam API的联机扩展

GMOC

Game Maker Object Creation Tool

Pixel Prophecy

GameMaker Manual hinting

Syntax highlighting and formatting tools for GM:S/GMS2 documentation

GMTiled

A Tiled to GMS2 Room converter.

lazyeye

GMTransfer

A tool allowing you to import multiple resources from one GameMaker Studio 2 project to another.

Shoot'em up!

Shooter

A high-end code editor for all things GameMaker