What programming languages, development environments, repositories are used?

What programming languages, development environments, repositories are used? Of which amount is the code?

The WissKI software is programmed in PHP and JavaScript. As development environment you can use any PHP development environment (e. g. Eclipse https://www.drupal.org/node/75242). As repositories there are GitHub (https://github.com/WissKI) respectively Drupal Git in use.

The code of the WissKI software currently amounts to ca. 40000 lines.