https://www.dropbox.com/s/8lqd641u9sw2v6h/LevelUp.jar At the moment it's OPs only, as there are no permissions yet with 1.0.0. Commands are /level {player} [level] Player and levels are optional, and it defaults to self and 1.
@rockxz2135 I've just realised I have made a small error regarding Op permissions, i.e, you can't level a player who isn't an Op. This is fixed now, same link.
I can do it as well, it's just the permission system is for 1.8.1, so I'm going to wait for a recommended build before implementing permissions. If you want to do that, that's fine though.