This will speedup your phone and save battery life...because some of it running at the background.
Save to DISABLE android Jelly Bean application list.
1. Goto Settings > Application Manager
2. Goto [ALL] tab
3. Select app to disable/uninstall
4. DONE!
Disable it. Enable it if you would like to use it later.
Note:
-To completely uninstall it use Titanium Backup