Are you wondering what all the icons on my site
Probably you are, otherwise you would not be reading this.
"This service checks HTML documents for conformance to W3C (World Wide Web Consortium) HTML and XHTML Recommendations and other HTML standards."
Sites displaying this icon have been validated against the latest HTML 4.01 standard.
Campaign against browser specific websites. Sites displaying this icon can be optimally viewed with any web browser.
"The GIMP is the GNU Image Manipulation Program. It is a freely distributed piece of software suitable for such tasks as photo retouching, image composition and image authoring".
Debian is a free operating system (OS) for your computer. An operating system is the set of basic programs and utilities that make your computer run. Debian uses the Linux kernel (the core of an operating system), but most of the basic OS tools come from the GNU project; hence the name GNU/Linux.
Apache is the most used web server software in the world. It is a freely distributed piece of software developed by the members of the apache foundation.