Everyone was excited when Apple announced AirPrint for iOS last fall, but too few supported printers killed the buzz. Printopia 2 ($20) from Ecamm helps resolve that issue by acting as a print server on your Mac, allowing you to route printing to any of the devices on your home network.
Setup is ridiculously easy. Once you’ve installed Printopia, it sits in the “Other” section of your System Preferences tray and automatically connects to all of your networked printers. That’s it. Nothing to do on the iOS device; everything automatically shows up when you go to choose your printer. Better yet, you can even print to PDF, and save to services such as Dropbox, Evernote, or a number of other Mac applications. There’s currently a week-long free trial on Ecamm’s website; it’s not sold through the Mac App Store.