Internet Archive is an online library that offers permanent access for researches,scholars, people with disabilities, and the general public to historical collections that exist in digital format.
2- Project Gutenberg
3- Federal Resources of Excellence
This is a platform provided by the United States government that offers excellent educational resources pertaining to a wide range of subjects
4- British Museum
The British Museum allows users to learn and discover more than 500 Museum objects and have access to some awesome adventure games and many more.
5- School Forge
Dyscover is a software system designed to help children with learning disabilities. It can be used to teach characters, numerals, pronunciation, word-association and many more useful and creative things.
KidsKnowIt provides the highest quality educational activities, products, movies, music, games, articles, text books, learning programs, lesson plans, worksheets, and distribute them completely free of charge.
8- Language Games
This is a great website that offers games that can help students acquire foreign language skills.