rEFIt is a boot menu and maintenance utility that enables users to boot multiple operating systems, including triple-boot setups with Boot Camp, on EFI-based machines such as Intel Macs. It also provides an easy way to access and explore the EFI pre-boot environment.
Wineskin Winery creates Mac OS X ports/wrappers for Windows programs/games, with an easy-to-use GUI, integrated Wine, X11 and an installer.
LiquidMac uses a particle system to imitate liquid and responds to laptop orientation.
