The Eco Button provides a useful way to not only cut your energy bills, but also do your bit to help stop global warming. The idea behind it is a simple one – whenever you’re not actually using your PC, hit the Eco Button and it will go into a power saving state so it’s not using more energy than required. It’s simple to set up – just plug it into a spare USB port and then load the software. Once everything is in place, you just have to remember to hit the button whenever you step away from your computer. The bundled application will keep track of how much energy and money you’ve saved.

Price: £15
Where to buy: £www.iwantoneofthose.com