Windows: Quick access to key folders on your system can be a big time saver. MedalFolders puts all your favourite locations two clicks away in the system tray.
After installing MedalFolders, open up the main window from the tray icon and drag and drop your favourite folders to add them. Once you've got all your folders set up, you can access them from a menu by clicking the tray icon to open your folders in a new Explorer window. Despite its name, you can also add executables and other files to MedalFolders to launch or open using their default applications.
The only problem I found while setting up my folders was that MedalFolders didn't want to recognise system folders like My Documents when dragged from the My Computer location. In order to add them, I had to find them in the Windows directory structure and add from there. A minor annoyance, for sure, but one that only has to be dealt with once. MedalFolders is freeware, Windows only.
This application is far from the first to tread in this territory, so let us know how you get to your favourite folders in the comments.