http://strictlyenglishusa.com/
http://i-courses.org/ (Excellent website for iBT TOEFL exam takers)
TOEFL Free Sample• Free TOEFL Practice Test (iBT) that covers parts of all test components – Reading, Listening, Speaking, and Writing.• A glance upon real TOEFL iBT exam and software interface.
TOEFL Tests (iBT)• Realistic and best quality Full Length TOEFL iBT Practice Tests Online.• Mini Tests (iBT) for advanced experience.• All TOEFL Practice Sections are scored and explained.
Free English Tests for ESL / EFL, TOEFL, TOEIC, SAT, GMAT (An amazing source for iBT TOEFL listening practice)
http://english-zone.com/index.php
http://www.bbc.co.uk/worldservice/learningenglish/index.shtml
http://www.listen-and-write.com/
http://www.englishclub.com/esl-games/
http://www.5minuteenglish.com/