There are 3 repositories under minecraft-classic topic.
Standalone proxy which allows players to join EVERY Minecraft server version (Classic, Alpha, Beta, Release, Bedrock)
ViaVersion addon to add support for EVERY Minecraft server version (Classic, Alpha, Beta, Release)
A Powerful and Modern Minecraft Classic Server Software - Written in 100% Python & Compatible with Classicube!
A Minecraft Classic server in JavaScript
A Minecraft Classic clone for the Wii
An extensible Minecraft Classic compatible server.
A modern fork of classic.minecraft.net!
Minecraft Classic server written in Lua
A great version of Minecraft Classic 0.30 with newer features and enchantments.
A multiplayer cuboid game engine focused on re-implementing Minecraft Classic
A Minecraft Classic Server written in Rust (Mirror of https://gitlab.com/nokoe/classicl-server.git)
🎯 A library for Minecraft server ping
Glowstone is a game server implementation for the Minecraft Classic protocol written in Python extended with Cython.
Minecraft Classic server
A handy tool that gives informs user about block/item ID's for legacy Minecraft versions.
Translation proxy allowing joining MC Classic (0.30c) servers with VoxelSrv