Free learning resources are core to our social mission. We believe that the main barriers to starting education are access, lack of confidence and cost. This is why the Open University works to remove these barriers. We build on formats and platforms that are available offline and online. This improves our discoverability and access. We eliminate cost by planning the delivery of free learning through sound and sustainable business models. We improve learner esteem and confidence by helping them gain badges and statements of participation.

The Open University has a radical and pioneering approach to access. Matching a refusal to place qualifications barriers in front of our own students, we also have a commitment to release and promote free learning content for others, for the benefit of the wider community. OpenLearn is a trailblazer for the provision of high quality open educational resources (OER) at scale and breadth, for free and accessible to all.

We deliver bite-sized learning experiences designed to fit easily into daily life. Whether you're looking to get promoted at work, support your children with their schoolwork, a student looking for extra study materials, or simply passionate about a subject, we are open. There are no requirements to access our free materials.

LibreTexts is the adaptable, user-friendly open education resource platform that educators trust for creating, customizing, and sharing accessible, interactive textbooks, adaptive homework, and ancillary materials. We collaborate with individuals and organizations to champion open education initiatives, support institutional publishing programs, drive curriculum development projects, and more.

LibreTexts is the largest centralized open education project and platform online. Founded in 2008 at the University of California, Davis as the ChemWiki, the LibreTexts mission is to unite students, faculty and scholars in a cooperative effort to develop an easy-to-use online platform for the construction, customization, and dissemination of open educational resources (OER) to reduce the burdens of unreasonable textbook costs to our students and society.

This is a curated list of free courses from reputable universities like MIT, Stanford, and Princeton that satisfy the same requirements as an undergraduate Computer Science degree, minus general education.

A free, independent, and open source set of curricula for learning languages.

This company sells conductive fabrics, woven not out of fiber but very, very fine wires. They seem ideal for sourcing primary components for building shielding - say, you're constructing an RF testing facility and you want to minimize leakage (or intrusive external signals). Or you're building yourself a Faraday cage for some reason.

Send them a graphic of some kind and they'll do custom fabric of it for you. No minimum order, they even sell test swatches.