Here are the best free online courses to learn OCaml, a general-purpose, statically-typed programming language that is widely used in academia and research institutions.

Discover how Udemy makes money, its different segments, instructor payouts, revenue growth, margins, and more.

Free medical education from renowned organizations including the Cleveland Clinic, MD Anderson, and Medscape.

In October, Class Central wrote about CreativeLive shutting down on December 31, 2025. That article led to a series of events that actually saved the platform. Just two weeks before the deadline, on December 15, CourseHorse, an online marketplace of live classes, workshops, and experiences, acquired it for an undisclosed amount. The website is no longer closing at the end of the year. In 2021, Fiverr acquired it for $11 million. Four years later, in May 2025, the platform stopped accepting new