| 1. | Samizdat Press: free textbooks, lecture notes, and software for downloading. |
| 2. | Free textbooks in mathematics collected by Alexandre Stefanov. |
| 3. | Some free textbooks and links on the site of the Math. Institute in Ufa. |
| 4. | Physics forum. |
| 5. | Physics forum in HK. |
| 6. | School No. 1106, Moscow. |