Twine - Twine is an open-source tool for telling interactive, nonlinear stories.

Workona - A better way to work in the browser.

Ink by Inkle - ink is a popular open source scripting language for branching stories, designed for writers

OneTab - Whenever you find yourself with too many tabs, click the OneTab icon to convert all of your tabs into a list. When you need to access the tabs again, you can either restore them individually or all at once.

Quest - Quest lets you create sophisticated text-based games, without having to program.

Session Buddy - Manage Your Browser Sessions