Minetest mod for player experience management (xp) It adds an xp counter per player and ranks according to your xp level. The xp level, your rank and a progress bar to the next rank will show up in your hud. On every rank level up you get a award-like notification. There is also a xpgate block which, when placed under a wooden door will only allow players with a certain xp level to go through.
XP Redo
Adds experience, ranks, and doors only accessible to those above a certain rank. Not actually a redo of any mod.
Great for servers
Adds fun to the game by showing some progress. Levels are also very intresting for players on multiplayer servers. Plus the server owner can require a certain level for things players may want (more areas, special tools, privs, ..).
Downside is that players may be inclined to do things just to get to the next level.