While installing and uninstalling applications in OS X is far easier then doing it in Windows, there could still be improvements. Both OSes, (Windows more then OS X) leave behind extra files (usually in the Library) that could be gotten rid of along with the application.
A while back I wrote about a wonderful little application called AppZapper which gets rid of all those extra little files that nest themselves deep within your hard drive.
The new version shows when AppZapper is being updated, it allows you to delete multiple programs at once, and it’s gotten smarter about deleting all the files associated with the program your deleting.
AppZapper is shareware but well worth the $12.95.[Source: TUAW]