XPMonitor allows you to create XP bars for guildmates also running the addon. Useful for groups that are leveling together, or for keeping track of guildies you're boosting through quests or instance running.
Usage:
/xpm create <player name> - create an xpbar for a player
/xpm createall - create an xpbar for all non-level capped, logged on players
/xpm createbar <player name> - display a player's xp using your reputation bar
/xpm delete <player name> - remove a player's xpbar