This 200 design collection on CD is conveniently produced in PDF & GemCad formats. They are mostly round and some fancy cut designs, cataloged in numeric order. Information about the author, Bob Kay, can be found here.
"With advancements in technology, Lightning Lap continues to evolve. Our goal is to help meet the needs of lapidary users everywhere. If it wasn't for the wonderful community at large, Lightning Lap wouldn't even exist. It is your honest input that has stirred the juices of thought and experimentation. Thanks to all supporters and aficionados of LL products. Without your friendship and support, none of these ideas would likely exist."