FunBrain: Word Confusion: Choose the correct homonym to finish the question. Features easy and hard sections.
Homonyms, Homophones and Homographs: Explains the differences between these types of words. Includes worksheets and resources. [Worksheets require Adobe reader.]
Homophones Sentence Completion: Test your understanding of words which sound the same as each other by dragging and dropping them into sentences.
Quia: A Feast of Homonyms: A matching game of homonyms. Includes match, concentration, flashcards, and word search.