Plugin Name: Heros
BukkitDev Link:
http://dev.bukkit.org/server-mods/heroes/
What it does: Heroes is a dynamic, flexible and highly configurable class, skill and experience system. Heroes itself is the hub of your players RPG experience, boasting classes, multi-tiering, and advanced skills. Along with classes, Heroes offers your players a new style of PvP through our well-developed skill system and our weapon + armor restrictions. No longer will your mages have the ability to use diamond swords, your rogues will no longer sneak around in their heavy diamond tunics and most importantly, you can now hurl fireballs and stun your targets.
Have you seen it used: No
Why should we have it: This is an expanded version of McMMO, which we are running now, but adds more skills.
Plugin Name: iConomy
BukkitDev Link:
http://dev.bukkit.org/server-mods/iconomy/
What it does: A simple, and easy to use economic core. It provides an easy to use API / service for other plugins to utilize to create innovative and new creations like lottery systems, card games, shops, and more.
Have you seen it used: Yes
Why should we have it: Base economy plugin, if we want to have shops, and jobs and stuff.
Plugin Name: Vault
BukkitDev Link:
http://dev.bukkit.org/server-mods/vault/
What it does: Vault is a Permissions, Chat, & Economy API to give plugins easy hooks into these systems without needing to hook or depend on each individual plugin themselves.
Have you seen it used: Yes, we use it currently
Why should we have it: It hooks into other plugins, not really anything seen on the outside.