AppTrap!

Revo Uninstaller helps uninstall software from Windows systems and has a free and a pro version. Its main purpose is to remove unnecessary files and registry entries left behind by incomplete program uninstallation routines. Revo Uninstaller is a much faster and more powerful alternative to "Windows Add or Remove Programs" applet.

AppCleaner is a small application which allows you to thoroughly uninstall unwanted apps.

Standard removal program leaves tons of leftovers on your PC. GeekUninstaller performs deep and fast scanning afterwards and removes all leftovers. Keep your PC clean! Use Force Removal for stubborn and broken programs.

Bulk Crap Uninstaller (also known as BCUninstaller), is a free, open source program uninstaller for Windows OS. It is a powerful program capable of detecting and removing orphaned applications, clean leftovers, filter the program type (such as those that belong to Microsoft) and more. It was designed as a tool for the tech users, but it can be easy enough to be understood and used by anyone. Bulk Crap Uninstaller will run on almost all Microsoft Windows OS.

SlimComputer is a freeware application that is designed to rapidly and easily clean trialware from a new PC. The goal was to make an ultra-portable program that can be either loaded onto a new PC or run remotely from a thumb-drive. Once activated, it cleans out trials, demos, and advertising links, leaving a new computer a fresh blank slate, ready for the users' customizations. After its initial use, SlimComputer makes a terrific multi-use cleaning platform, offering quick access to a powerful uninstaller, system optimizer and backup maker, everything you need to maintain a smooth, clean OS. »

The tagline say it all, "The uninstaller Apple forgot". AppZapper is for people who want to confidently try new apps while knowing they can uninstall them easily. Drag one or more unwanted apps onto AppZapper and watch as it finds all the extra files and lets you delete them with a single click. A slick safety system remembers which apps you want to keep safe, and the log tracks all the files you've zapped.

Preview installed applications and remove service files to complete uninstall.

AppDelete is an application for Macs that will delete the application you choose and any associated items (files and folders) that belong to that application. Now you will no longer have to hunt through your system to find these items and delete them manually. Or worse, just let them sit on your Mac forever even though the application is long gone!

Safarp is a small and fast alternative to the Add or Remove Programs Control Panel applet of Windows 2000/XP. It displays a list of the installed programs and allows one to uninstall / repair them.

Utility to completely uninstall, search & remove traces when uninstalled, as well as check for new versions of programs. Also has a built-in software rating.

Install Monitor provides a better application management platform for Windows. This includes the ability to monitor application resource usage and uninstall completely. It helps to solve the problems of software rot and bloat.

CleanApp is a Swiss Army Knife of system maintenance utilities: it keeps your Mac clean, lean and efficient.

TrashMe has drag-and-drop uninstall, a list of applications, widgets, preference panes and plugins to select from for uninstallation, and more.

App Uninstaller is a Mac utility that allows to uninstall applications on Mac OS X completely.

Windows Uninstaller is Windows Explorer menu extension for fast and simple removal of Windows software.