Windows: If you ever come across an online video you'd like to keep it with you, NetVideoHunter is the app you need. This handy Firefox extension lets you save embedded videos from websites like Youtube, Dailymotion and Metacafe among others, and save them right to your hard drive in FLV. It includes a built-in video player and can handle multiple downloads.

BlackBerry: If you've already got bored of your BlackBerry Storm and are wishing you'd bought an iPhone instead then fear not because iPhoneishStorm Theme will give it a passing resemblance to Apple's legendary mobile device. The theme completely overhauls your home screen, adding a series of iPhone-style icons, as well as a dock at the bottom of the screen.

Mac: If you think that Apple¡s iChat is a bit limited, then you might find Chax gives it that little something extra. Chax is a collection of minor modifications and additions that extends iChat and makes using it far more pleasurable. The preferences alone add several new features to iChat, then there are all the other benefits, which include a unified contact list and growl notification.