Yale Web Style Guide:A manual covering graphic and information design, page layout, graphics, site navigation, and multimedia content.
10 Rules of Website Design: Checklist of guidelines for designing and building a website that works from Sharpened Productions.
Adding Value to your Links: A bulleted guide to using links effectively in hypertext writing.
Cyberfrem: Offers basic guidance and advice on designing effective, usable, easily navigable web sites.
Information Design: Digest of knowledge on interaction design and information architecture, including the web and new media.
Style Guide for Online Hypertext: Defines common terms and outlines good design principles.
Stylegala: A showcase of graphic design for the web. Particularly supports coding standards.
Sucky to Savvy: Tips on what it is good and not good to include on a webpage for the novice web designer.
What is Good Hypertext Writing?: There is more to writing than putting words next to each other, and there is more to writing hypertext than throwing together a bunch of links. By Julia Degener.
Writing: An index to A List Apart's articles on writing, style and usability.
Writing Well for the Web: Internet-specific copy writing tips for non-writers. Covers common mistakes.