iPhone/iPad thermometer: If you've got kids, they probably pick up all manner of nasty bugs at school. Using the ThermoDock infrared sensor for iPhone/iPad/iPod you can quickly measure if they've got a temperature without even touching them. This model was £59.95 but it's now available for just £11 at Amazon.co.uk. (Beware though, this is for 30-pin iOS devices only which means iPhone 4S and older, iPod touch up to 4th Gen and iPad 3 and older)
Smart speaker: The Creative Axx 20 will play music from your phone over Bluetooth, it'll act as a soundcard for your computer so you can watch movies and play games. You can answer calls through it using its smart microphone - it's a great thing to keep on your desk. It was £169.99 but we found it for £67.20 at Amazon.co.uk
Microphone: Samson Go Mic Compact USB Microphone is a versatile computer-based miking and recording device. It's able to clip directly onto your laptop or sit unobtrusively on your desk and plug and play operation also means it's completely compatible with a Mac or PC, with no drivers required. It's also currently just £26.99 at Amazon.co.uk!