All our online tools are powered by LimeSurvey™ software. We strongly recommend you to get an extensive look at LimeSurvey's oficial website to make up your mind about the application numerous features (more than you might expect), consistent documentation and engaged community.
LimeSurvey is widely used in higher education and in a lot of universities all over the world.
LimeSurvey's "Expression Manager" was created by Dr. Tom White. This powerful and sophisticated system, controls the majority of the survey-taking portion (including navigation, conditional branching, validation, and tailoring).
The application is constantly improving and new releases allow the creation and implementation of plugins and we can expect some promising add-ons in the research field. A good example of an external developpment of LimeSurvey is the GemsTracker package, initially designed as an extension to the functionality of LimeSurvey and used as a respondent tracking system for clinical trials and population studies.
With LimeSurvey, there's no administrative overhead so you are free to build and launch surveys as needed once you have access to the system. For REDCap Survey, we need to track usage and report stats; therefore, there's an administrative component that may present a practical limitation for surveys that require quick implementations and/or frequent edits with very little advanced notice.
1. Source: rc.partners.org
2. Related: Singleton et al. Wireless Data Collection of Self-administered Surveys using Tablet Computers. AMIA Annu Symp Proc. 2011;2011:1261-9. Epub 2011 Oct 22. PMID: 20584330