Scala Multimedia MM200
Scala Multimedia MM210
Scala Multimedia MM300 (There were some non dongle versions)
Scala Multimedia MM400 (There were some non dongle versions)
Scala InfoChannel 400
Scala InfoChannel 500
They used a HASP dongle, with different colors for the different versions.
I cant remember correctly, but i believe both raytracers, Tornado 3D and Caligari, at some point used dongles for copyprotection purposes.