Zig is a general-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.

Klipse https://github.com/viebel/klipse
allows to interactively edit and run programs written in
Common Lisp, javascript, clojure[script], python, brainfuck, scheme
in a Javascript-enabled web browser.
Ironically, it does not seem to work with Firefox 52.6.0 (64-bit)/Windows 7.

Prototype of a translator from a python-like syntax to C. Found via
https://www.jwz.org/blog/2017/04/python-has-a-lot-to-fucking-answer-for/#comments

On http://xed.ch/help/, a number of useful personal technical notes can be found.

For example, http://xed.ch/help/usbdrive.html describes how to create bootable USB drives.

Free add-ons for Firefox and Chrome to help translating between chinese or japanese and english.

A Wiki about the Tcl programming language and the Tk graphical toolkit.

Project Jupyter was born out of the IPython Project in 2014 as it evolved to support interactive data science and scientific computing across all programming languages.

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.