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

This online course gives an introduction to the C programming language. C is one of the foundational languages of computer science, for example used in operating systems. The...

Khan Academy provides various free introductory physics video lessons. Topics include velocity and acceleration, forces and Newton's laws of motion, gravitation, energy,...

This course teaches how to add sign up, log in, and log out functionality to Rails apps, as well as how to manage access to specific pages.

Khan Academy provides various free introductory video lessons on electrical engineering. Topics include circuit analysis, amplifiers, semiconductors, electrostatics, signals and...

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

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

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

This course teaches how to program in C#, which is used for programming mobile applications, games and enterprise software.

This online course includes various free introductory history video lessons. Topics include:The beginnings and the neolithic revolution; Ancient civilizations in...

Khan Academy provides various free introductory chemistry video lessons. Topics include atoms and compounds, chemical reactions, the periodic table, chemical bonds,...

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...

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

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

This course teaches how to program in R, which is a popular language used by data scientists and researchers.

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

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

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

Free Turkish 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.