(commercial) BBEdit offers an intelligent interface provides easy access to BBEdit?s best of class features including grep pattern matching, search and replace across multiple files, function navigation and syntax coloring for numerous source code languages, code folding, FTP and SFTP open and save, AppleScript, Mac OS X Unix scripting support, "clippings" support, and a complete set of HTML tools.
CreaText HTML text editor
CreaText is an HTML text editor with some basic and advanced features. CreaText has got many functions which make creating websites easier, e.g. Tag Coloring, easy access to the Mac browsers, the change of special characters into HTML entities in realtime, an Insert menu with rapid access to all usual HTML commands, an HTML color chooser, drag & drop, and the possibility to setup HTML parameters when creating a new document.
(commercial) CSSEdit's intuitive approach to style sheets and powerful editing features will make you deliver standards-based sites.
iPalette is a small app for Mac OS X that converts colors to either hex or RGB values for use when you are doing graphics, designing a website, or developing an app. It is supposed to give users a quick and easy way to get color values for any color they want.
With Simple CSS you can easily create Cascading Style Sheets from scratch, and/or modify existing ones, using a familiar point-and-click interface.
Taco HTML Edit
Taco HTML Edit is a full-featured HTML editor and PHP editor distributed as freeware. As an HTML editor, Taco HTML Edit empowers its users to rapidly create their own web sites. It is designed exclusively for Mac OS X and has many advanced features including spell checking, live browser previewing, PHP previewing, syntax checking, and much more.