BetaMoon

Content is written as Lua scripts that run on top of Risugami's ModLoader and Minecraft Forge for b1.7.3, and the mod itself adds no content of its own. Its scripts can define custom blocks, items, tools and armor materials, recipes and recipe types, fluids, biomes, trees, structures and ore generation, along with block and item overrides, tile entities, containers, block GUIs and event handlers. The Lua API is documented on the project wiki.

The design resembles KubeJS, with Lua in place of JavaScript. Setup avoids the obfuscation and compile steps usually needed for Java mods, and the project aims to make scripting simpler for Beta b1.7.3. It is still in early development, so not every feature a modder might want is available yet, and changes can break existing scripts between major versions. Multiplayer support is limited, and installing BetaMoon on a server is advised. Environment is client and server, so the server and every player need it.