DesktopServer is computer software that makes WordPress development on your local computer quicker, easier, and more feature-rich. Version 3.4.0 (they like to copy the WordPress Core version numbers) was released June 18, 2012, with a pleasing list of new features and bug fixes.
For those already using DesktopServer, notice the download page no longer has separate installation files for “new install” and “upgrade install”. Instead, there’s just one installation file per operating system (Windows or Mac) per version (Premium vs. Free version). This new installer gives you the option to upgrade or install a fresh version.
Some other great new features include:

