Overcome the fear of speaking to groups by Ron Kurtus
Effective Business Communication Skills
Good article on Communication skills
Business Writer's Free Library
Building Blocks of Writing: Vocabulary, Spelling and Grammar - Free management library
Examples of fire drills, grievance procedures, and instructions for using equipment.
Plenty of examples on email, proofreading, global communication etc.
Publication of Toastmasters International which is a nonprofit educational organisation that teaches public speaking and leadership skills.
How to Improve Your Presentation Skills
Newsletter by Inc.Com
Publication of the Writing Center of University of North Carolina at Chapel Hill