Change windows transparency and size with a mouse wheel.
With Feewhee you can easily resize windows and control their transparency with a mouse wheel. Feewhee is probably still the simplest, most natural and unobtrusive.
simple to use, no actual 'install' it runs from any location just double click the exe file to run it.
Cons
Not an issue really, but it has no interface so I wasn't sure it had installed until I tried to use it
Summary
Hold the cursor over window title bar and scroll to resize it or shift scroll to change transparency-Simple. I'm using it to trace one 3d model from another 3d model underneath. (non compatible file formats)