ExtremTech is a 20 slots heavy modet Minecraft server, running through the TechnicLauncher. 

The server is with economy, so you need to mine to get $ to buy some land to protect your home, or team up with others and make great towns and more.

You have the chance to make enough $ to buy a shop in the mall, where you can sell items to others.

PvP is on, only in spawn you are safe, and if you buy your own zone.