Sawtooth Software (www.sawtoothsoftware.com) is the recognized global leader in choice analytics (conjoint analysis and MaxDiff). Its DIY platform may be used for designing and fielding questionnaires, with flexible features for piping, looping, skip logic and dynamic list building. Both Windows and web-based versions available. CAPI for interviewing with devices not connected to the web. Free technical support, free hosting, no per-respondent or per-study fees. Consulting also available for a variety of marketing science needs.