Hi all,
I know it's not really specific to Free Software. However, I am sure this could be interesting to anyone reading this list and to all folks publishing articles or blog posts on fsfe.org web sites.
This is a short article on what makes a good hyperlink:
Writing Hyperlinks: Salient, Descriptive, Start with Keyword http://www.nngroup.com/articles/writing-links/
Summary: To help users quickly find what they need, anchor text should stand out from the body content and accurately describe the page that it refers to.
Best,