Backup your apps directly to flashable zip file, build your own update.zip!
---------- IMPORTANT ----------
App2zip is in very early stage, does NOT work on some devices, so please first of all make a test to see if it works for you (e.g. backup an app you don't care much, uninstall it and restore back via CWM recovery). Use at your own risk!
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ROOT REQUIRED!
App2zip allows to backup applications directly to a zip file flashable via CUSTOM recovery.
Building your own update.zip file is easy:
1) Choose the apps to be included in the zip file (you can pick system apps too)
2) Click GO! and wait until the zip is done. That's it!
Note: Restore via stock recovery is not supported yet.
Note: This app won't work without root access.