Wine - Open Source Software for running Windows applications on other operating systems.
SMB Utility - This is the most amazing SMB editor yet.
CodeWeavers CrossOver - Don't buy a Windows license, don't reboot and don't use a Virtual Machine. Try a free trial of CrossOver to run your Windows software on Mac, Linux and Chrome OS.
Cheat Engine - Cheat Engine is an open source memory scanner/hex editor/debugger for Windows.
WineBottler - WineBottler is an App to manage and wrap your Windows apps into convenient OS X apps.
SMB Title Screen Editor - A title screen editor for Super Mario Bros. GUI is in Japanese. English readme created by AP.