AmeriSpeak: Common american sayings and what they actually mean.
AskOxford.com: For questions on English grammar, spelling, and usage. Search a dictionary of words, names or quotations.
Capitalizing: Provides a list of rules and examples. Includes sentences, quotations, proper nouns, names, titles, and scientific nomenclature.
Cliche Finder: A searchable database of overused expressions, with a fun feature creating a random list.
Common Errors in English: An explanation of common English usage errors and how to avoid making them.
Dictionary of English: Clichés, Pretentious Language, and Jargon: Presents a list of examples of three kinds of language to avoid, with an explanation of why they are not recommended.
Garbl's Editorial Style Manual: Searchable advice on abbreviations, capitalization, grammar, numbers, punctuation, spelling and word usage.
Grammar Slammer: This help file indexes style and usage, capitalization, abbreviations, punctuation, letter writing, common mistakes and a grammar glossary.
Guide to Grammar and Writing: Features searchable index of grammatical rules, explanations, comments on style, and usage suggestions.
New Words In English: Neologisms and new uses of words in English.
Plain English Campaign: Working internationally to try to get public information written in plain English, instead of using gobbledygook, jargon and legalese. Includes examples, with annual awards for the worst offenders.
Plain Language: A guide to help writers avoid confusing language and long-windedness. Can be viewed online or downloaded as a PDF.
Right Words: A series of short articles about grammar and punctuation, with light hearted examples of common mistakes.
The Elements of Style - William Strunk: Principal requirements of plain English style. Focuses on the rules of usage in literature, composition and grammar.
The Sports Cliche List: A searchable collection of cliches used by American teams, fans, coaches and commentators, with humorous comments and sound clips.
Top20Composition.com: Online directory for grammar, spelling, puncuation, research, creative writing, and proofreading resources.
What is Plagiarism?: Answers common questions that students may have on the subject and confronts some of their excuses for not giving proper credit to their sources.
WordWizard: Learn about word meanings, slang, quotations, insults, and famous authors.