From the website [L1 ]:
Caius is written in ITcl and includes interfaces to Expect and Selenium. Written by tobijk.
Per the developer (Aug 2017 caius-users Google Group topic ), the Caius project is now only on limited maintenance.
Caius used to contain a pure Tcl package for processing Markdown. A predecessor of the Caius Markdown module became the one now in tcllib .
APN The above now installs on Windows as well.