Castor EDC - Castor offers you a user-friendly and fully featured application for electronic data collection.
qTox - A Qt graphical user interface for Tox.
Medidata CTMS - Medidata CTMS seamlessly integrates with Medidata Rave to provide real-time views into study progress without manual tracking.
Tox - Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.
OpenClinica - OpenClinica is an open source clinical trials software.
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.