What's it?
It's a simple Linux/Windows tool to search for and download updates for your XBOX360 games directly from your PC (no need of XBOX Live!))
You have simply to select one or more XBOX360 ISOs and the program automatically will get the Media-ID (using ABGX) and will search for the latest available update on the online database of xbuc.net. Then you'll can download it directly using this program, so without the need to open any internet browser or external programs.

What's new/fixed (v3.0 - Linux ONLY):
* Completely rewritten the layout of the GUI (again)
* Now the program's window is resizable so it can fit any screen resolution
* Moved all controls from buttons into menus
* Added keyboard shortcuts to the most important commands
* Now the program saves the settings (input/output folder and modes) and automatically reload them at next startup
* New dependency for the program: gambas2-gb-settings

What's new/fixed (v2.0 - both Windows and Linux):
* Completely rewritten the layout of the GUI
* Now the program will not close automatically
* Batch support: you can now work with more than just one ISO
* Two new options available:
-Silent Mode that performs all operations without asking for user confirmations
-Rename all Mode that prevents overwriting files which are named in the same way
Official Site: http://www.redsquirrel87.com