Controlling the Hue lamps directly with the mouse and keyboard is a very pleasant thing, especially when you're sitting at your desk at home. I've already introduced you to a few options, such as We Love Lights, a nifty little app for the Mac. If you don't want to spend any money, there is now another alternative.
Do you want to control your Hue lamps via a browser on your computer? Then take a look at the Online Hue Controller by Jakob Lykke. The developer from Denmark has created a tool that is certainly not perfect, but nevertheless great. The handling of the open source project is very simple, but a little trick is necessary.
Fabian