CatConomy is my attempt at making a modular Economy plugin that does not fall into the trap of relying on a set database. Just Implement IDatabase and then use the bukkit services API and if it has a higher priority than LOW the plugin will use it.
The current supported databases are:

• SQL
• MapDB (file)

Transaction Logging
this plugin by default logs every transaction that take place. Look in Server Folder/CCLogs/
You will see and be able to read these logs.

As of 0.0.10 The current commands are:

/balance [optional player name]
gets the balance of the chosen player or by default yourself
permission: catconomy.balance

/deposit [player name] [amount]
transfer money to another player's bank account
permission: catconomy.transfer

Admin Commands

/catconomy give [player name] [amount]
gives the player money from thin air.
permission: catconomy.give

/catconomy take [player name] [amount]
takes the money from the player, providing it won't put them into the negatives
permission: catconomy.subtract

note:
The plugin contains Vault API support.