Twee-Integration-for-Vim is a project mainly written in Vim Script, it's free.
Syntax highlighting and compiler support for twee interactive stories creator
This is a mirror of http://www.vim.org/scripts/script.php?script_id=3007
This adds syntax highlighting and compiler support for twee files (*.tw). The syntax highlighting was prepared with a dark colorscheme in mind.
Typing :make in .tw files will run twee (1.7.5) on them and pipe it to an html file named as the current file. That is, running :make on fiction.tw will create the fiction.html file.
Twee (http://gimcrackd.com/etc/src/) is an interactive stories creation tool based on TyddlyWiki, developed by Chris Klimas.