Brush Up Your Grammar
From the Marquette Writing Across the Curriculum Web site
Online Writing Lab at Purdue University
You'll find tips about many aspects of writing, both academic and professional.
Plain English, Yes; Complex Jargon, No
More links from the Marquette Writing Across the Curriculum Web site
"Jabberwocky Junkies" by Tony Proscio
"Why we're hooked on buzz words and why we need to kick the habit." from The Grantsmanship Center Magazine, Fall 2002
Writer's Handbook from the Writing Center at the University of Wisconsin Madison
Excellent resource for help with many aspects of writing.