I use Ubuntu on my main computer and recently found this program to tweak Ubuntu.
download site. It is designed for the GNOME desktop environment so KUBUNTU users will have to still do things the old fashioned way. Be sure you back anything up that is important to you before you use this the first time as well since there are some options that could allow you to change important settings. It does make you enter the root password and give you warnings before entering areas that allow changing important settings. There is a large list of 3rd party software available that saves a lot of time on a fresh install.