Merriam-Webster Dictionary Online

http://www.m-w.com/home.htm

A searchable dictionary and thesaurus are provided as well as a daily vocabulary builder and daily word games.

Guide to Grammar and Writing

http://webster.commnet.edu/HP/pages/darling/grammar.htm

Site that covers sentence structure, common usage, punctuation. Developed by Professor Charles Darling at Capital Community-Technical College in Hartford, Connecticut.

Documenting Sources from the World Wide Web using MLA

http://www.columbia.edu/cu/cup/cgos/idx_basic.html

Modern Language Association of America's summary of guidelines presented in the fourth edition of the MLA Handbook for Writers of Research Papers. This site includes how to cite articles, books, and poems from personal and professional web sites, journals, magazines, reference databases, and postings to reference databases.

Documenting Sources from the World Wide Web using APA

http://www.apa.org/journals/webref.html

American Psychological Association summary of guidelines presented at this site. Examples included.