I forgot all about this. If I recall, it was the result of a brainstorm between myself, Rescudo and XCal. Screenshot and download link at the end of this post. This is likely pushing 10 years old, and I just tested it, still works perfectly
Usage:
- Open all of your expected clients (no limit)
- Open the MDI app
- Press "Hook" once for each client (It will pull the running clients into itself, one at a time)
- Tile/Cascade as you see fit
No more having multiple windows open... ONE WINDOW TO RULE THEM ALL
Click the image for full resolution screenshot (I took the screenshot spanned over 3 screens)
Original screenshot from way back when it was written: