NOT ON THE LIST IN 2015
For Mac users, Parallels lets you run Windows without rebooting. You can run Mac OS X and your favourite Windows applications at the same time. You can even drag-and-drop files between desktops!
Cost: Commercial. Free trial
Comments from those who selected Parallels as one of their Top Tools
“Now I can check how web pages look in IE without finding a Windows machine. Its like getting a windows machine for the price of a software program.” David Parry
“Sometimes I need Windows on my Mac” Cary Gordon