Printopia $19.99 (approx £16)

decisivetactics.com

Let’s say you have a printer, and it‘s a good one that works perfectly well. But you also have an iPhone or an iPad, and you want to print things from it. By running Printopia on your Mac, your iOS devices will be able to send things wirelessly to your Mac’s printer as if it were an AirPrint-compatible model – because basically now it is!