Here at Xobni, we were first using Retrospectiva: http://retrospectiva.org/ http://retrospectiva.org/. Pretty UI, fast, Rails-based, simple to use and tweak. Fr

Here at Xobni, we were first using Retrospectiva: http://retrospectiva.org/ http://retrospectiva.org/. Pretty UI, fast, Rails-based, simple to use and tweak. Free. We later switched to Jira, which is expensive but powerful and a bit cluttered. Jira actually charges a flat price, not per seat as nostrademons suggests.