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This online course teaches how to manage data with SQL, including mastering complex commands to manipulate and query data stored in relational databases. It includes topics such...

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

This online language teaching method/app includes various languages, such as a German, English, Spanish, French, and Italian language course, and more.

Khan Academy provides various free introductory programming video lessons. Topics include JavaScript, HTML and CSS, SQL, and more.

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

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

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

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

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

Khan Academy provides various free introductory microeconomics video lessons. Topics include supply, demand, market equilibrium, scarcity, preferences, consumers and producers,...

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

This online course gives an introduction to Kotlin, a popular programming language for Android development, web development, and more.

This collection of YouTube playlists provides an introduction to car technology for beginners. It includes several video lists on topics such as car engines, engine components,...

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.

This online course teaches how to publish a personal website to the public Internet.

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...

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

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

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

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