Castor EDC - Castor offers you a user-friendly and fully featured application for electronic data collection.
AskNicely - Collect customer experience feedback on a daily basis and empower your team to take immediate action to drive retention, upgrades, reviews and referrals.
GNU Health - GNU Health is a Free/Libre project for health practitioners, health institutions and governments.
Delighted - The fastest and easiest way to gather actionable feedback from your customers
OpenClinica - OpenClinica is an open source clinical trials software.
Survicate - Collect feedback on your website and find out more about your visitors.