Workona - A better way to work in the browser.
Twine - Twine is an open-source tool for telling interactive, nonlinear stories.
Session Buddy - Manage Your Browser Sessions
Ink by Inkle - ink is a popular open source scripting language for branching stories, designed for writers
Toby - Better Than Bookmarks
Quest - Quest lets you create sophisticated text-based games, without having to program.