In addition to the core Apache module, Rivet provides a number
of Tcl packages that include potentially useful code.
dio is a database abstraction layer.
form - for creating forms.
calendar - a package providing a simple configurable calendar generator
rivet entities - an UTF-8 / HTML entities converter
formbroker - a form data validators broker
ASCII Glyphs - prints most of the ASCII character set as large ASCII art glyphs