AppDelete!

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. »

AppTrap is a PrefPane for System Preferences which enables you to remove applications by simple drag & drop to the Trash.

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.

WinUtilities is a multi-functional system performance and optimization suite for Microsoft Windows. This collection of tools lets you supercharge your PC's performance, enhance its security, tweak and optimize its settings, and customize and personalize your screens. Registry Cleaner makes your system more stable by cleaning out the bad Registry entries that build up each time you install and uninstall software. The program's Registry Optimizer defragments and rebuilds your Registry, making your entire system run more smoothly and quickly. The program includes powerful tools to clean and optimize your hard drives. The Disk Cleaner removes clutter and unnecessary files from your PC, allowing it to run more quickly. The DiskDefrag module defragments your hard drive, keeping it running efficiently. WinUtilities's Windows Optimizers keep Windows running faster. The Memory Optimizer ensures that memory is released properly when you stop running each program on your system. More features include secure file deletion, recycle bin shredding, maintenance tasks scheduling and file recovery. »

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

**iTrash** is an uninstall utility that uses a special search algorithm (Levenshtein Distance algorithm) to find all related files and deletes them when asked.

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.

UninstallPKG is an application that allows you to completely remove so called "packages" (file-extension .pkg) and all their installed contents from your Mac. UninstallPKG can be used to reclaim precious disk-space by removing unwanted functionality like unused printer drivers or completely remove applications you no longer use. UninstallPKG can also keep your Mac clean by removing left-over files from applications that you have already partially removed manually. UninstallPKG can remove all 37290 files of Office 2011 at once or completely remove things like Java or the Flash plugin. UninstallPKG is also able to clean-up after uninstalling an application by removing it from the Dock and LoginItems and erasing the files it has generated (preferences etc). »

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.

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