A new type of wallpaper can block Wi-Fi signals from entering or leaving a building.

It’s a great find for those who want to personalize the look of their iPod touch, iPhone or iPad — and at less than $1, it’s a steal, too — but be aware of some inappropriate images as part of this million-plus wallpaper archive.

Your iPhone, iPad and iPod touch wallpaper does not have to look like everyone else’s. This clever app can help give it some personality and style.

It’s a question I get often from readers: “How do I change the background image on my iPhone and iPod touch?” Here’s how…

Customize the Windows 7 logon screen in a few short clicks.

For a few days I wowed my friends with a free animated theme for BlackBerrys called “Sea Storm,” which shows a violent sea storm as your wallpaper and uses a cool font for all the text. If it’s so great, why did I get rid of it so fast?

Customize practically everything in Windows for a more personalized computer.

Using multiple monitors is simple with built-in support in Windows and Mac. Increase your productivity today!