I don't know if anyone has used this, but I thought it's a very handy tool.
It's called Android Commander
http://androidcommander.com/
Allows you to manage files on your rooted device.
You can use ADB features such as Push,Pull,Install,Mount etc. All without entering a command-line.
Unless I'm mistaken you can use it to sign files too.
But remember guys, with power comes great responsibility