I also developed other public domain applications.
Download them from the anonymous FTP site  ftp.cica.indiana.edu  in directory  pub\pc\win3\toolbook :
HYPCPP25.ZIP	Hypertext introduction to Dr. Tonfoni's CPP Methodology
PIEMNU30.ZIP	Prototype of gesture based menu
PIE2LANG.ZIP	Use gestures to write natural language sentences
PENBOOK.ZIP	Capture gestures using Toolbook with Pen Windows
MMDESK10.ZIP	Interact with the new multimedia desk