Questions about the Project
What is ALGLIB aimed at?
Who are the authors of the ALGLIB?
What relation does the website have to Russia?
What is AlgoPascal?
Where can I find the algorithms for the work with files, drawing diagrams in OpenGL, etc?
Can I send my own algorithm to the website?

It is mostly aimed at creating a convenient and efficient multilingual scientific software library.

The first version of ALGLIB was made by Vladimir Bystritsky. He spent a number of years on the maintenance of the website by himself. Eventually, he lost his interest in the website, so I (Sergey Bochkanov) took over the work on its maintenance, by common agreement.

Originally, ALGLIB was a Russian-language website. Later on, a part of the website was translated into English. At present, there are two versions of the site - Russian and English.

AlgoPascal is a programming language, designed particularly for this project. The programs, written in this language, are processed by a server-side automatic translator and translated into other programming languages by the computer. More detailed information is provided in section "About the site".

As we noted before, the main goal of ALGLIB is to create a multilingual library of algorithms in the area of numerical analysis. The problems, related to those enumerated in the question, do not fall into this category. Exceptions are made for a number of problems, though the project can be characterized by a clear-cut specialization.

Yes, you can. Many visitors send their algorithms to the website. If I find them interesting enough for a general public, they will be located at the website after editing and issuing an explanatory article. Why do people do it? It is quite natural for people to help one another.