-Run classic emulators such as Gameboy color, Gameboy advance, Nintendo DS, Super nintendo.

-Run custom dashboards such as freestyle dash, Mame..etc

-Share specific game modifications with other people over Xbox LIVE (aka 10th prestige and infections)

-Modify accounts and files on the hardrive

-Modify any game you play on the jtag (whether it be GTA IV or MW2)(Aimbots, walk through walls, teleporting..etc)

-Custom power on led's with freestyle dash (with the new freestyle dash you can choose all led's on your console to be all red, all orange, or no color)

-Turn fan speed up or down with freestyle dash

-Copy entire games to the hardrive and run them off of it(no disc needed afterwards)

-Download trial games from the XBLA and fully unlock the game ( Trials HD..etc)

-Run unsigned XEX files (XEX files are like .EXE files on your computer, but the Xbox is programmed not to run any of these files that do not have a valid digital signature by Microsoft. The JTAG modification allows modified XEX files to run, which can load more modded FF files that contain game settings and configurations.)

-Copy full movies to the Hard drive and never need that disc again

-Run XEX menu (XeX Menu is a program to browse files on the HDD and external devices, and run them. It is labeled by the Xbox as a Game Demo. If you are using your JTAG online and in XeX Menu, it will appear to others as Session Sample.)

-Play original Xbox games without a Hard Drive

-Unbann yourself after being banned by microsoft (How long depends on the Keyvault)

-Add content to games that would not be there normally

-Run Linux (Linux is a free operating system, free of charge and everything. It's specifically made for pc but people have figured out ways to exploit it to other electronic devices. In other words INTERNET on your 360)

I give all credits to -SexEd- :!:

+rep for that cheers matee