XNet by McJty
Advanced Networking
XNet: Additions by kaduvill
XNet add-ons
XP Collector by TTGImp
XP Orb Collector.
XP Diary by dyeogame
Store your experience!
XP From Harvest by RealGecko
Literally harvest XP
XP Holder by Insane96MCP
Adds a block that contains Experience. Crafted in a unique way!
XP Matters by Lime
Increase player's HP a bit for every XP level gained.
XP Orb Clump by Surreal
XP Teleporters by LatvianModder
This mod adds XP Teleporters
XP block by Jonah, MCreator
XP-Plus by Poke
More use for your XP!
XP-Stacker by MineWIZ
XP-ngots by Dbrown55
Show off your experience with castable experience (Requires EnderIO and TConstruct)
XPBook by Winter_Grave
Gives a book to store XP.
XPBox by clocka, plodsoft
Store exp conveniently.
XPParty by Eufranio
Simple party plugin with XP distribution
XPcooker
This is an example mod
XPyourself by Toby
Keep your XP save