Castor EDC - Castor offers you a user-friendly and fully featured application for electronic data collection.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
GNU Health - GNU Health is a Free/Libre project for health practitioners, health institutions and governments.
Eventzilla - Eventzilla lets you sell tickets online and manage attendees from one integrated application.
OpenClinica - OpenClinica is an open source clinical trials software.
Splash - Anyone can create a Splash event, whether you're a company hosting a single event or an individual hosting a personal event like a birthday or wedding. Get Started for Free. Text goes here. X. Full Event Program.