With AKM you can give players money for every kill they get in PVP. Every player has a killstreak and if you kill someone with a higher killstreak than yours, you will be awarded additionally.
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Config:
BaseMoney - The money every player gets for each kill basically
ExtraMoney - The money every player gets in addition for every killstreak point of his/her victim that is higher than his/her killstreak
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This plugin requires the Vault plugin (just download the latest version of Vault.jar HERE)
This plugin requires a Mysql Database (The user data ist fetched/stored here when you shutdown / reload your server - edit the credentials in the config!)
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/stats <player> - Show the money, kills, death, killstreak and KDR of every player
Attention: This command is case-sesitive, so keep attention to upper/lower letters in playernames