BookStats allows your players to view their in-game stats in a book. BookStats has a bunch of place holders you can use . BookStats also allows you to customize the book.
/BookStats Info: Gives you your stats in a book! Permission: BookStats.getbook
/BookStats reload Info: Reloads bookstats config. MySQL/flat file changes require restart. Permission: BookStats.reload
MySQL and flat file supported builtins:

Vault
PlayerData pd = new PlayerData(player); // This will send a message displaying the amount of kills the player has. player.sendMessage("Kills: " + pd.getKills());