Web developer needs to the build the web site/web application for different purpose. However, users may have different screen resolution. Web developer needs to test their web site and ensure they are working well for different screen resolution.
Resize Browser is a free utility that will resize your Internet browser window. You can use this utility to resize the browser without changing the resolution of your own screen. It resizes any browser window to 640×480, 800×600, 1024×768 or any custom size. You can verify your web site or web application works well at different screen resolutions. This utility also allows you to include/exclude the taskbar.
It suppors Windows 7, Vista, XP, 2003.
The software can be found in following URL