Nim is a systems and applications programming language. Statically typed and compiled, it provides unparalleled performance in an elegant package.

   High-performance garbage-collected language
   Compiles to C, C++ or JavaScript
   Produces dependency-free binaries
   Runs on Windows, macOS, Linux, and more

Various number theoretic algrorithms written in the bc(1) programming language.
See also the calculator program http://www.numbertheory.org/calc/krm_calc.htm from the same author.

For a good example, read http://www.evanmiller.org/dont-kill-math.html

Interpreters/compilers for more than 100 programming languages which can be used on-line.

Interesting blog from a recovering video games programmer.

by Alan A. A. Donovan, Brian W. Kernighan

Interesting blog, found via his critique of Julia (mostly its development model).

Mark Chu-Carroll's blog covers many subjects, including mathematics, physics and programming. In this article he describes his design of a programming language suited for an editor (think about a more readable
version of TECO's language).

Despite the availability of many excellent books and scientific articles and daily discussions on comp.lang.fortran, information about modern Fortran programming is sometimes difficult to find. There is a need for something that changes faster than books, papers, and documentation, but is more persistent and organized than a newsgroup. The Fortran Wiki aims to fill this void. Its mission is to provide an open and community-driven venue for documenting and discussing all aspects of the Fortran language, from compilers and standards and best practices and design patterns.