Computer Janitor

Computer Janitor is a free software application that removes clutter from a computer system that accumulates over time. It is a free software installed in Ubuntu by default. Software packages that are no longer needed can be uninstalled. When the system is upgraded from release to release, it may miss out on configuration tweaks that freshly installed systems get.

It attempts to find software packages that can be removed, and tweak the system configuration in useful ways.