Listen in English
Most language learners need more listening practice. Listen in English has a lot of listening activities based on TV shows, movies, and news for beginners to advanced students.
ESL Conversation Questions
This site not only has questions by topic and grammar, but also supplementary questions for several well-known textbooks. Useful question collections and role play books are sold there too.
ESL News Stories
News stories with vocabulary, discussion questions, audio, and printable worksheets for students of English.
This site is about learning grammar with sentence diagrams. It's great for anyone who wants to improve their understanding of grammar but especially for those who like visual representations of abstract ideas.