Colaboratory - Free Jupyter notebook environment in the cloud.
Teachable - Create and sell beautiful online courses with the platform used by the best online entrepreneurs to sell $100m+ to over 4 million students worldwide.
Numerai - Hedge fund that crowdsources market trading from AI programmers over the Internet
Clever - syncing between education applications for K-12 schools
Infosec Skills - Infosec Skills is technical expertise and engineering development knowledge-building platform where engineers and technical experts can come together to share and learn about the latest security development techniques and strategies.
Claroline - Claroline is a collaborative eLearning and eWorking platform.