SumTotal Systems (formerly Asymetrix Learning Systems and click2learn.com) - Makers of ToolBook, Asymetrix Librarian, Web 3D, Digital Video Producer, and more.

The ToolBook List - Get on "The List" and ask questions, share ideas, and plug-in to what's happening with Asymetrix. Tell John we sent you!

ToolBook Users' Web - Hosted by the Institute for Learning and Research Technology (ILRT) at the University of Bristol.

Márcio's ToolBook & Multimedia Hotlist - A Comprehensive Meta-Reference for ToolBook, Multimedia, Internet and Education Authoring.

TCC Publishing - Producer of ToolBook (paper-based) books. Also offers training, consulting, and custom CBT development.

ToolBook Web Ring - Provides additional links to ToolBook resources.