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Free Polish language app with many short tests to learn "on the go". (Not a video course.)

This course teaches how to program in Ruby, a flexible language used to create many websites.

Free Korean language app with many short tests to learn "on the go". (Not a video course.)

Khan Academy provides various free introductory biology video lessons. Topics include acids and bases, properties of carbon, macromolecules, energy / metabolism, enzymes, cell...

Free Danish language app with many short tests to learn "on the go". (Not a video course.)

This online course teaches how to use color effectively to create attractive and useable websites.

Free Russian language app with many short tests to learn "on the go". (Not a video course.)

This online course introduces learners to the basics of Lua, a general-purpose programming language used for building games, web apps, and developer tools.

This course teaches how to program in Go (Golang), an open-source programming language supported by Google.

This online course teaches how to build powerful interactive applications with this popular JavaScript library. React is an open source library developed by Facebook.

This course teaches how to program in C++, which is a language well-respected for its flexibility and low-level functionality. It is used in the development of operating...

This course teaches how to program in PHP, which is one of the most popular languages of modern web development.

Khan Academy provides various free lessons for learners who prepare for the MCAT test.

This course teaches how to style websites with CSS.

Free Hungarian language app with many short tests to learn "on the go". (Not a video course.)

This online course gives a free introduction to digital currencies such as Bitcoin. It is also the first course of an online master's program in digital currencies from the...

This online course teaches intermediate techniques to transform table data in SQL.

These online lessons explain the basics of histology. In addition to the free video lessons, further (paid) trainings are available.

Khan Academy provides various free introductory video lessons on the history of the United States.

This online course teaches how to create websites by structuring the pages with HTML.The course is designed for beginners and includes HTML elements and structures as well as...