mystery.knightlab.com

Solve a murder mistery case by learning, improving and practicing your SQL skills. Enter SQL Queries and get startet right away. A walkthrough is also

comparisontabl.es

ComparisonTabl.es allows you to use detailed comparison tables with all specifications and/or features on products and services. This allows you to compare, sort, filter, and

ourworldindata.org

Research and data to make progress against the world’s largest problems. Our World in Data (OWID) is a scientific online publication that focuses on large

annas-archive.org

Open-source digital library with 35M+ books/novels, and 100M+ papers. Also contains comics and magazines.

littlerbooks.com

Learn the main ideas of influential books in minutes with the most concise yet comprehensive book summaries anywhere. It’s free-to-read and digestible bullet-point summaries will

omnicalculator.com

A huge collection of calculators from several Fields like Biology, Physics, Constructions,… to help you get to the right result

libraryofbabel.info

The Library of Babel is a place for scholars to do research, for artists and writers to seek inspiration. The library is basically just a