http://dev.bukkit.org/bukkit-plugins/feather-economy/
https://github.com/Squawkers13/FeatherEconomy

It's a nice little plugin which I think would be nice to have Vault support.
It doesn't support banks.

There's a few notable differences:

• API methods require UUID objects
• Uses integers instead of doubles
• Complicated methods to use the API should not be required

You can add Vault support yourself.

For example, my plugin basically registers the object itself:

Registration Portion
Economy Class

That's good to know!
Will work on that. :)

EDIT: It's working, but EssentialsEcon is taking precedence? (Even though it claims it isn't)