Let me represent "Project Minetest-c55":
It basically copycats Minecraft and InfiniMiner like hell, but I like to say it is /inspired/ from them. I am hoping it will evolve into it's own type of a game.
- The basic minecraft stuff: digging, placing blocks, crafting items and tools and other stuff and using them.
- Multiplayer over network
- Has a neat map generator and almost infinite height limit (same as the horizontal limits)
- A decently performing minecraft-like lighting engine.
- Thanks to Irrlicht, runs natively on Windows and Linux.
You can read more and get it here:
http://minetest.net/
![Image](http://celeron.55.lt/~celeron55/minetest/images/natural_formation_1_small.png)
EDIT 2010-12-31: Fixed link and changed image to a more recent one. Also, please see the site for an up-to-date feature list, as I won't be updating this message for that part.
EDIT 2010-04-06: Updated image