February’s Site of the Month: Mathematical Etudes
This is a Russian site, but has an English and a French version, use “en” or “fr” at the end of the URL.
The site contains several 3D animated films that illustrate theorems or ideas in mathematics, and much more. For example, in the Apps for iPhones there are 90 cryptarithms which are available in English, French, German, Italian, Russian, and Spanish.
This post is also available in: Arabic