These spinoffs were very short-lived and i would like to know more about them since I was a kid when they were on the air.

Checking In-spinoff from Jeffersons
Sanford Arms-spinoff from Sanford and Son
Grady-spinoff from Sanford and Son

There is a website that covers every single spinoff that probably ever existed.

http://home.earthlink.net/~jinxo/maincrosslist.html