The best free AI courses and certificates for upskilling in 2026 - and I've tried them all

I've worked with AI for decades and have a master's degree in education. Here are the top free AI courses online that I recommend - and why.
IEEE

An Advanced Algorithm for Accurate Retrieval of Liquid Water Cloud Properties Using Spaceborne Radar

Abstract: Low cloud microphysical properties, including liquid water content (LWC), cloud effective radius (CER), and cloud optical thickness (COT), are fundamental to climate modeling and weather ...
IEEE

Extending Artery/OMNeT++ for Evaluating V2X Sensor Fusion Algorithms With Infrastructure Support in Cooperative Advanced Driver Assistance Systems

Abstract: Artery is a well-known V2X (Vehicle-to-Everything) simulation framework for evaluating vehicular communication systems. It is built on top of the OMNeT++ simulation environment. Although the ...