| | | | | | --- | --- | --- | --- | | 1 | Internet Archive | [https://archive.org/](https://archive.org/) | Non-profit library of millions of free books, movies, software, music, websites. | | 2 | Wikipedia | [https://www.wikipedia.org/](https://www.wikipedia.org/) | Free content online encyclopedia written and maintained by a community. | | 3 | | | | | 4 | | | | | 5 | | | | | 6 | | | | | 7 | | | | | 8 | | | | | 9 | | | | | 10 | | | | | 11 | | | |