OpenClinica - OpenClinica is an open source clinical trials software.
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.
Castor EDC - Castor offers you a user-friendly and fully featured application for electronic data collection.
Olvid - The most secure messaging app in the world.
Medidata CTMS - Medidata CTMS seamlessly integrates with Medidata Rave to provide real-time views into study progress without manual tracking.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.