Sith Games

Early Classic+:

Early Classic+ is a mod for 0.0.13a_03 that adds multiplayer support, new blocks, and other cool things.

Singleplayer: Play, or Download the client

Minecraft Infdev Ultimate:

Download the mod here, or Download the server

It's got multiplayer, some other improvements, and it's even more stable than Alpha servers!


Infdev Ultimate is currently nowhere near finished, but you're free to try it.
Keep in mind that it's under heavy development and can be a bit unstable during updates.
You can read more on the discord server, or here.