Virtual Windows Manager

Hello,

I'm looking for a good Virtual Windows Manager. I had one a few years ago, but I can't remember the name of the company that produced the software. Basically, it had a very small window (proportioned 3x3) that allowed me to click on the squares and open up windows/apps that would only be shown on the screen while that particular square was activated. I know this sounds convoluted but that's my best description, sorry. Any help would be much appreciated.

*I put this question here because I didn't exactly know where to put it and it was suggested by a few other members that I move it. It's not a security question, so I hope this forum is okay. *