Brigadier is a command parser & dispatcher, designed and developed for Minecraft: Java Edition.

Cloudburst Nukkit - Nuclear-Powered Minecraft: Bedrock Edition Server Software

A protocol library for Minecraft Bedrock Edition

GoMint is a modern Minecraft Bedrock Edition server enabling you to make your visions come true

Blocktopograph - Blocktopograph is a fan-made app for MCPE, it includes a top-down world viewer and a NBT editor.

A world generator that is based on Voronoi diagrams