Links (misc)

Airbus Beluga en Getafe (in Spanish). Check this great website if you want to see this very special aircraft.
Blabla Meter tells you how much bullshit your text contains. Available in Spanish too.
Top500 contains, among other things, a bi-anual list of the most powerful computers, with data since 1993.
2700chess is a website where you can see live chess rankings of 2700+ ELO players in all three formats (classical, rapid, and blitz).
Stanford Enciclopedia of Philosophy
An online version of Oblique Strategies, a card “game” created by composer Brian Eno and painter Peter Schmidt
International Space Station live feed
Astronomy Picture of the Day (APOD)
Calendario Meteoro Fenológico (in Spanish. Change manually the year in the (...)cm-XXXX.pdf part of the address to visit other years. The first publication is from 1943, and as of 2025 they seem to be up to date.)
Macaulay Library is the world’s premier scientific archive of natural history audio, video, and photographs. It’s origin focused in birds but it currently includes mammals, amphibians, fishes.

Maths and Physics

Error Correction Zoo: Website to categorize and organize known classical and quantum error-correction schemes.
Quantiki, a website for wiki on quantum information, as well as a community portal where people regularly post job offers and the like
nLab is a wiki for collaborative work on Mathematics, Physics, and Philosophy — especially (but far from exclusively) from the higher structures point of view: with a sympathy towards the tools and perspectives of homotopy theory/algebraic topology, homotopy type theory, higher category theory and higher categorical algebra.
Groupprops is a sub-Wiki dedicated to group theory. It’s full of detailed examples.
DesignTheory.org is a website where you can find resources related to combinatorial designs. While it is abandonded, and rather incomplete, it still has useful things