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.

accessiBe - Making websites accessible to people with disabilities

Clever - syncing between education applications for K-12 schools

Sim Daltonism - From the perspective of a color blind person, some colors are impossible to distinguish.

Claroline - Claroline is a collaborative eLearning and eWorking platform.

Coblis - If you are not suffering from a color vision deficiency it is very hard to imagine how it looks...