Zoom loom is only one version of a pin loom. It is a 3 pin cluster loom of the type developed in the 1930s that was extremely popular for decades. There have been folks quietly making some version of them off and on since they fell out of general favor so they have been around but not popular. My first pin loom was a wooden one from Hazel Rose Looms. Then a few years later Schacht brought out the Zoom loom and suddenly they became popular again.
Places to check out
Pin Loom Weaving Support Group on Facebook
https://www.eloomanation.com authorized pdf copies of many of the original booklets printed for the pin loom as well as information about them. A good place to get lost in.
http://www.pinloomweaving.com - author of many books on Pin Loom weaving and has some good information on making your own
https://adventuresinpinloomweaving.com interesting site with her exploring what a pin loom can do PLUS there is a post about how to contact Wunderwag looms to get information on the looms they are currently making
https://turtleloom.com not as easy to navigate as some of the others it is full of ideas on making things from the "squares" made on their hexagon, and other shaped loom. Look on Etsy under BluebonnetCrafters to buy their looms. They are intriguing, fun to use looms and the shapes are really fun to combine into designs and patterns for all kinds of items.
Also on Etsy are BigFam15 who make and sale both 3 pin and bias weave looms from recycled wood.
There are other loom makers on Etsy and at least 4 or 5 shops who have patterns designed to be made with pin loom squares.
Um yes I do have a few pin looms and do make things with them.