Freeware/Shareware for Web Designers (Everything except Opera is free)HTML/CSS HelpWorld Wide Web Consortium :: They set the web standards. Archaic and advanced.
Web Design Group :: Outdated but extremely useful. They do possess downloadable help files for HTML 4.0 and CSS 1.0 Specifications
Browser TestingMozilla Firefox :: Small, fast, reliable browser. Great standards support. Great with the
Web Developer Extension. Moderately used.
Opera Web Browser :: Best Standards Support. Best Support. Shareware. Bummer. Used in limited numbers.
Internet Explorer :: If you do not test your site on the industry standard, you might as well shoot yourself in the foot. Standards support should appear in IE 7. Widely Used.
EditorsNotepad2 :: Better than Notepad. Will syntax highlight almost any coding language.
Notepad :: It's on your computer. Use it. Your best tool by far.
Arachnophilia :: Java-based Syntax Editor. Has tabbed editting (before Firefox). Very easy. Very nice.
NVU :: Free version of mixture between Microsoft Frontpage and Macromedia Dreamweaver. (WYSIWYG) Yet, it is free. FREE. (It does support PHP.)
Server TestingXampp Lite :: (Thanks to RCTHelp for this one) This is the only local server I will recommend. With Xampp Lite, you can test your site on an Apache server with php and MySQL capabilities without shelling out the extra cash to pay for webhosting.