you don't need an app to share printers between windows and mac. All you need to do is to setup a home network, with a network printer attached to it, and let your mac connect to it. Go to system prefereces > sharing > check file sharing and printer sharing.
Once you have done that, under system preferences > print and faxes > click on the plus sign to add your printer. Locate it in your network. And under print using locate the driver for your printer in the list, if you can't find it on the list, you may need to look for a mac driver for your printer. And you should be all set.