Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
OMR Software - OMR stands for Optical Mark Recognisation or Optical Mark Reader.
Maian Support - Free responsive PHP Helpdesk System
PaperSurvey.io - Effortless automated paper-based survey data collection
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
queXF - queXF, a CADE (Computer Assisted Data Entry) Tool, processes filled paper forms that were created in queXML, such as survey questionnaires.