Say that you need to resize your open explorer or program window to a certain exact predefined size, and that you have to do it often ! How do you do that? Use Freeware Sizer!
Sizer is a free program that allows you to resize each window to an exact and predefined size using the context menu of the right mouse button. You can also move the reduced window to an exactly preset position if necessary.
This is very useful when designing web pages, as it allows you to see how the page will look smaller.
The utility is also useful when compiling screenshots for documentation, with Sizer you can simply keep the same window size for all screenshots.