GEneric Medical Survey TRACKER is written in PHP, using Zend Framework.
GemsTracker is a tool for tracking fixed sequences of surveys asked to groups of individuals or organizations.
GemsTracker is not a tool for building and administrating surveys. For that specialized survey software packages are used by GemsTracker, with LimeSurvey as the first among equals.
Testmaker is an application written in PHP for creating questionnaires that can be administered online. Provides multiple response formats (likert, single selection, multiple choice, open, etc.) and methods to store the results. The documentation is available at: http://jharo.net/dokuwiki/testmaker (spanish)
PHP Interview System is a easy-to-use research system to build complex survey(s), interview(s) and poll(s). The interview can be dynamic (interactive) flow. Collect and react on input. Export data for analysis.
An Open Source, web based mail survey tracking system. queXM has sample management, uses AAPOR outcomes, can implement the Total Design Method (Dillman), generates postal manifests, and assists with questionnaire form archiving and tracking.