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OBIS builds and maintains a global alliance of scientists to facilitate free and open access to data and information on biodiversity and marine life.
Platform for interactively exploring the evolutionary relationships between all known species, offering detailed information on all clades and links to other resources.
Founded in 2002 by Nobel Laureate Carl Wieman, the PhET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations.
Over 6,000 Free Cheat Sheets, Revision Aids and Quick References!
A collection of free printable digital collage & ephemera sheets using authentic vintage images from the public domain.
Designers Éthiques is a non-profit organisation that explores the best practices in the design of digital services, in order to make the field more sustainable, desirable and free.
This site provides access to millions of digitized works and images, including Voynich’s manuscript!
