Open Textbooks

General Sciences Textbooks (Licences vary)

A collection of open textbooks on different science-related topics.

Repositories

Applied Math and Science Education Repository (AMBER) (Licences vary)

A collection of educational resources and services on topics related to applied math and science.

Tools

PhET Interactive Simulations (Open Source – CC BY)

The PhET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations. The site is available in a number of languages.