This plugin lets you to create as much currencies as you need in config. Also it supports Vault. It saves the users' information in personal files, so it wouldn't extra load the server.
This isn't the final version of the plugin. I will update it in future, until it becomes a really good and useful one!
Main commands: ========================================================
/eco set [player] [amount] [currency] -
sets the amount of a currency to the player -
permission: neco.setbalance /eco give [player] [amount] [currency] -
gives the amount of a currency to the player -
permission: neco.givebalance /eco pay [player] [amount] [currency] -
moves money from the player who have sent the command to the target player -
permission: neco.pay /eco info [player] -
shows the player's amount of money of every currency -
permission: neco.info ========================================================