Rapid CSS Editor 2005 

Quickly and easily create and edit cascading style sheets of any complexity. Write your style sheet and HTML code manually or let the program do it for you. In each case it is easy because of various helpful features like Inspector and Auto complete.
css style sheets rapid css html editor xhtml editor css editor html css validate

SoliNav 2005 

Visual Studio.Net 2003 doesn't come out of the box with a good way to browse and navigate your code. SoliNav combines a file-oriented class view with a powerful context-sensitive navigation engine to help keep your mind focused on your object model.
visual studio.net add-in class view