CTFs as you need them
Fast and lightweight JavaScript game engine built on WebGL and glTF
Self-hosted CMS platform based on the Laravel PHP Framework
JavaScript framework to build game engines, games, emulators and apps
Java Settlers
2D Game Engine
The imaginary eight-bit machine
A complete web framework to create online Fighting Fantasy adventures
A synchronisation component for p5.js
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
3D .NET engine for Windows, Linux, Mac
Free strategy browsergame engine.
AutoTeach makes kids study and learn in exchange for internet access.
Modular Gaming Open Source Persistent Browser Based Game Framework
Open source network game service
C-Lesh is a game programming language for 2D games.
An HTML web game platform
Simple Point & Click Game