Links:

Fourstatic uses quite a few third party technologies to make everything work smoothly and to give you the option to work with the tools you know.

Twig
The templating engine that makes a lot of Fourstatics features possible.

JSON
A great way to store data, with small filesizes and universally usable.

YAML
Makes even smaller files possible than JSON, but isn't quite as universally usable.

SASS
Makes CSS so much more enjoyable, with things like variables and mixins.

LESS
An alternative to SASS that has a similar popularity and set of features.

Markdown
Very easy markup language that is converted to HTML.

jKit
A very easy to use and feature rich frontend toolkit, based on jQuery.

Fredi Bach
My personal blog (in German).