MiningCash is a simple plugin that allows your users to mine ores and receive money. The plugin grants dynamic amounts of money and the values can change (currently from initial configuration and a random number generator). More information can be found on my wiki.
Drop the .jar file into your plugins directory, grant miningcash.reward to the users/groups that should profit from mining and reload the server.
If you have the permission, start mining! You will receive cash per ore mined.