Open source software is developed as a collaborative effort with the intent to make its source code available to other programmers for use and modification. Open source programs are usually available for free.
The Web was born in a particle physics laboratory (CERN) in Geneva, Switzerland in 1989. There a computer specialist named Tim Berners-Lee first proposed a system of information management that used a “hypertext” process to link related documents over a network.
Web page authoring
Adobe Dreamweaver www.adobe.com
Microsoft Expression Web www.microsoft.com/products/
Nvu (open source web page editor) www.nvu.com
HTML (Hypertext Mark-up Language) is the language used to create web page documents. There are a few versions of HTML in use today: HTML 4.01 is the most firmly established and the newer, more robust HTML5 is gaining steam and browser support. Both versions have a stricter implementation called XHTML (extensible HTML), which is essentially the same language with much stricter syntax rules.