http://www.elllo.org
Excellent listening exercises covering a great variety of topics.

http://www.manythings.org
Interesting Things for ESL Students: There are grammar quizzes, word games, word puzzles, proverbs, slang expressions, anagrams, a random-sentence generator, listening activities based on Voice of America News and other computer assisted language learning activities.

http://www.soundsenglish.com
Sounds English is here to help you with listening practice exercises in English. You will be able to practice listening to English with the help of full lessons designed by professional language teachers to help you improve all your listening skills.

http://www.agendaweb.com
Hundreds of free exercises to learn English online: grammar, verbs, vocabulary, listening, songs, and videos. Worksheets and handouts.

http://www.examenglish.com
This web site is for people studying for an English language exam. You will find online practice tests for the most important international ESL/EFL exams: IELTS, TOEFL, TOEIC, and more. You can also find out information about the different exams.

http://www.eslfast.com/easydialogs/index.html
Here you will find short dialogues with their recording. After listening to the dialogue you can do a series of exercises.

http://www.eslfast.com/supereasy/index.htm
This site will help you practice your reading fluency and intonation, learn new vocabulary and check your reading comprehension. There is an index of topics to choose from, corresponding to basic, intermediate and advanced levels.

http://www.loondon.com
Here you will find videos of people from different countries talking about a variety of topics. Also, there are exercises containing key words, phrases and vocabulary.

http://www.dailyesl.com
This site presents short conversation starters or readings that you can study and then try to apply in everyday situations.

http://www.ezslang.com
Reduce your accent, speak more naturally, and understand conversational speech. EZSlang is designed to help you reach these goals in order to speak more naturally.

http://www.englishgrammarsecrets.com
Use these English grammar lessons for self study or to consolidate your lessons after class. There is an explanation page followed by various exercises. Topics cover all levels: elementary, intermediate and advanced.

http://www.rachelsenglish.com
This website was created to help people improve their American English pronunciation. At the core is a series of videos explaining in detail how each sound is created, as well as a blog.

http://www.howjsay.com
A free online Talking Dictionary of English Pronunciation. Write any word, you will hear the pronunciation.