Many mobile devices use Wi-Fi technology to connect wirelessly to the Internet and networks. Last month we told you about a standard called Wi-Fi Direct that will enable peer-to-peer connections with Wi-Fi devices without a router or access point. We now hear about an applications that use a similar concept, but instead turns your computer to a form of router.
Connectify requires a computer with Windows 7 or Windows Server 2008 R2, since the majority of the code comes from Microsoft's work with its new operating system, and a Wi-Fi network card. With Connectify activated you can connect to the network through Wi-Fi with other notebooks, mobile phones or other Wi-Fi devices.

The network sharing requires no software to be installed on the connecting units and the signal is encrypted with WPA2-Personal (AES) to make sure no unauthorized devices can connect. More information on the program and downloadable beta version at Connectify's website.
There you can also see that Connectify is indeed only supported by Windows 7, while the developers also praise the new operating system:
Connectify depends on improvements made in Windows 7 to operate. Frankly, Windows 7 is such a big improvement, that we suggest you're better off upgrading than waiting for us to get all this working on an older version of Windows.