MC-Gambling is a plugin that is fun and addicting for your players, they can test their luck in an intuitive GUI. And pssst the GUI is fully configurable, you are able to change all the chances and *uhm don't tell your players* you're able to rig your 'machines'. Sounds great doesn't it? And all of that in one small lightweight plugin.
Installation is really simple.
1. Stop your server
2. Drag the .jar file you just downloaded in your 'plugins' folder
3. Start your server
4. (*hint* most important step) Have fun!
Once you started the plugin it creates two config files. One is called 'config.yml' and the other one is called 'items.yml'. In the config.yml you can change all the messages that the plugin uses, and in the items.yml you can set up your gamble 'machines' everything is explained in the configs and I don't think there will be any problems configuring it. If you do experience problems, add me on discord: Stan#1185 and I will gladly help you out