News

• news ORF
• Der Standard
• NHK World
• Japan Times
• ARTE
• howstuffworks (not really news)

Humor

• XKCD
• Saturday Morning Breakfast Cereal
• Die Tagespresse

IT

• HackerNews
• heise.de
• LWN
• Golang blog
• Rustlang blog
• Python blog

Music

• radio.garden

Knowledge

• Europe: Capitals
• North and Central America: Countries
• The U.S.: 50 States
• South America: Countries
• South America: Capitals
• Europe: Countries
• Europe 1914
• Europe: Capitals
• Germany: Cities
• Africa: Countries
• Africa: Capitals
• Japan: Prefectures
• Asia: Countries
• Asia: Capitals
• French Speaking Countries
• Planets of our solar system