Bukkit

Have your players pay to switch their ranks!

Armageddon allows you to configure any dispenser as a cannon, it lets users throw grenades and shoot guns.

Harness the power of the Minecraft gods!

DiabloDrops

Kingdoms 2

Ever wanted to float around in zero-gravity, well now you can, with Enders Game!

Giants

Capture Gates and Portals and fight over the right to Portal! Various group and portal plugins supported.

A plugin to implements guilds and dungeons.

Add unlimited custom textured backpacks to your server.

PvPLevels Reloaded

CitizenSkins

Custom Profession skill trees

Have you ever wanted interactive blocks in your server? This is the solution!

Sore and pack your experience!

Gives Players The Access To Different Chests Filled With Differrent Enchanted Weapons And Armor

Randomly-generated treasure hunts based on values you set and as often as you want.

Allow items to be stored in secure Banks.

Add a physical currency to your server!

Provides an API to put any entity under plugin control.