Show/Hide Done (Accepted) Stories in Current column Pivotal Tracker
Simple extension to scratch an itch. More info about the problem it solves for me. http://community.pivotaltracker.com/pivotal/topics/please_let_me_hide_done_items_in_the_current_iteration
Download the latest [pivotal-extension.crx] (https://github.com/meeech/Pivotal-Tracker-Toggle-Done-Stories/releases) from releases and double click to install in Chrome. When you are on https://www.pivotaltracker.com/s/projects/* you will see a little Lightning Bolt in the URL bar. Click that to Show/Hide done stories.