Improved package management

It's not easy to keep track of all packages you've installed. If you like to try out new applications they often tend to be forgotten to never be found again.
It would be good if there were a way to keep better track of your installed appliactions. I suggest that you should be able to view your installed packages and only the ones you have installed yourself, the ones that ship with the distro should not be seen in this place.
To furter improve it i thing that libs would not be shown here, and that they automatically remove dependancies that came with the application you remove if they are not used by another application.
Also there should be a way to clear up libs not used by a currently installed package, just to help you keep your system clean and nice.