DXWnd

There are two different programs with this name, and similar functionality!

The other DXWnd tool can be found at the following URL, and the author is Skywing:

http://www.valhallalegends.com/Skywing/

That program (i.e. the Skywing DXWnd) is a completely different program, not sharing any code whatsoever with the DXWnd by NightWolve, and the Skywing version is also older (supporting only DirectX <= 7) and different in other ways too.

With Skywing's own words:

 DxWnd is primarily concerned with programs that use DirectDraw <= 7,
 with some experimental Direct3D support that somebody else contributed
 to me. In my experience, most newer (D3D) games almost universally
 support windowed mode; it was really just the older 2D apps using
 DirectDraw that tended to be lazy and not support windowed mode, at least
 of the games that I played.
 

 I started on the project with Starcraft as the then-available drivers
 for the laptop that I was using at the time had an irritating bug that
 caused them to tend to lose the ability to change resolutions without
 rebooting, and I got tired of having to do so for games that insisted
 on running at 640x480 fullscreen.