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 find exactly what you’re looking for. The site is operated by a single person and therefore has a limited amount of comparisons. But the existing comparisons are very detailed 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 global problems such as poverty, disease, hunger, climate change, war, existential risks, and inequality.

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 help you actually retain what you read.

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 huge collection of random text, but you can search it for patterns theoretically, it contains everything which has ever been written, or ever will be written

desmos.com

Desmos offers best-in-class calculators, digital math activities, and curriculum to help every student love math and love learning math.