Webmonkey - One-stop shop for Net knowledge.

Builder.com - Articles and reference for sitebuilding.

Review Web Authoring Tools.

Compare Dreamweaver to FrontPage.

Open source web editor Nvu.

Resources for Nonprofits - Idealist.org guide

eFuse.com - A friendly place to learn how to build a better website.

Beginning HTML tutorials

The Webmaster's Guide to Search Engines & Directories

Check Your Web Pages With Doctor HTML v5

Clip Art Connection - Free graphics

FreeGraphics.com - Free graphics

Is your non-profit site accessible? Check and see at http://www.cast.org/bobby/.
For information on the subject go to Non-Profit Site Analyzer.
Or you can review the Disability Etiquette Handbook.