http://www.yourdictionary.com/
A dictionary, a thesaurus, a section of word games and puzzles where you can write your name in six languages, and more

http://www.wordsmyth.net/
An educational dictionary-gives part of speech, usage, examples

http://www.m-w.com/netdict.htm
Merriam-Webster Collegiate dictionary with a thesaurus, a usage dictionary, and a word game of the day-fun stuff

http://www.wested.org/tie/dlrn/course/glossary.html
Annotated glossary of Web-based technology terms

http://www.educause.edu/ir/library/html/cmr9939/cmr9939.html
Web 101 for Dummies-or everything you wanted to know about the Web but were afraid to ask

http://www.iss.stthomas.edu/studyguides/wrtstr.htm
Index to writing guides-brief information on writing mechanics, writing types, including term papers or writing for the Web, and types of essays

http://www.iss.stthomas.edu/studyguides/bib_writing%20webs.htm
Bibliography of Web sites on writing including grammar, organization, structure, revision, citing sources, and more Web links