Grammar Check Great for students, secretaries, job-seekers, blog and article writers, or anyone who wants to make a good impression with their writing!
Avoiding Common Punctuation Errors Stephen Wilbers offers a pre-test, exercise and post test to help all avoid the most common punctuation errors. (skills: W, TS, CL)
English Centre Gallaudet University's English Works! writing webpages highlight the writing process and define in detail different types of writing, such as letters, essays, and business English. (skills: W, TS, CL)
Better English Better English has many writing and grammar lessons focused on business writing, in addition to a section on public speaking and presentations. (skills: W, TS, CL)
Writing Wizard The Writing Wizard offers both a wizard to create handwriting and printing worksheets, and links to many writing sites. (skills: W, TS, CL)
Grammar Workout This site from Empire State College, the State University of New York, uses interactive exercises to teach you how sentences work, how they're structured, and how to use active and passive voices. (skills: W, TS)
BBC - Skillswise Writing Covers many aspects of good writing, including planning, paragraphs and proofreading, and under other tabs, grammar and spelling. (skills: W, TS, CL)