Some starting points for using WikklyText.

UsingWik

Use the wik standalone tool to create, manage, render and serve full blown wikis.
Unless you are a programmer, this is probably what you want to use!

MarkupReference

A complete reference to the WikklyText markup language

For programmers

WikklyTextApi

Documents the primary entry points.

Other/older tools

wikkly2html

Renders a single text file at a time.

twextract

Tool for converting a TiddlyWiki to standalone HTML (superceded by wik).