Features collections of free to use online javascript calculators for astronomy, geometry, trigonometry, algebra, and many other areas. Also, available is free source code written in C and C++ for PC-DOS and Microsoft Windows, shareware that can be downloaded, and free mathematics tutorials. - (Read more)

Features classics of literature, mathematics, and science that can be read on-line for free. Books are organized by author and by topic. Many of these books are out of print and not available in many libraries. Includes a dictionary and thesaurus. Site can be searched by keyword. - (Read more)