Guide to Grammar and Writing
Well-organized guide to matters from sentence structure to essay structure. Besides taking quizzes on a host of standard grammatical topics, readers can click on button to see a random “notorious confusable” (a pair or trio of words that sound alike, such as “we’re” and “where” and “were”).

Common Errors in English Usage
List of common errors taken from the book “Common Errors in English” by Paul Brians.

Crossword Solver
Use this list of 50 commonly misspelled words to reduce the mistakes you make when writing texts, complete with examples and tips to help you get them right every time.

English Grammar Guide
Free online reference and guide for English grammar, writing, punctuation and learning with exercises, games and quizzes.

Verbix
Great site for everything to do with verb conjugation. The online conjugator conjugates verbs in English and many other languages. Enter any verb and it provides a chart in every possible person and tense. Irregular forms are shown in red. Enter a word in any language in the verb finder and it will tell you if it’s a verb, in what language, and will conjugate it for you.

Writer Resources
Includes resources for linguistically diverse writers, such as multilingual and Generation 1.5 writers. Covers topics such as Writing Processes, Academic Writing, Long-Term Writing Projects, and Job Search and Application Writing. Provided by the University of Illinois Urbana-Champaign.