General Writing Resources
The Writing Center

The Elements of Style, by William Strunk Jr.
Online classic focusing on the rules of usage and composition.
Guide to Grammar and Writing
(Wait a minute for this website to load, as it is an archived website).
Very comprehensive and must see website about grammar and writing.
The Tongue Untied
Semester course lessons about grammar, punctuation, and style.
Familiar Quotations, by John Bartlett