Classicube

ClassiCube is a clone of classic era Minecraft founded by Andrew PH and currently being actively developed by UnknownShadow200 and helped by Goodly and 123DMWM

They are a lot of community developed clients & servers as well.

Currently, there are three known server chains: Eddyn Hosting (Global), Vermonte Hosting (Hosting for Vermonte Servers only), and Redliner (Global).

Base Software
These are server software that form a base for the various clones.