30 Listening passages with question exercises, keys and transcripts in the Guest area organized by level. Many more passages available on subscription.
http://www.englishlistening.com/contents.phtml

An American English listening skills site with listenings at different levels of English. All audio files have consists of pre-listening activities, while listening activities and post listening activities. Highly recommended.
http://www.esl-lab.com

An interactive BC site for young adult learners of English. The listening section offers 68 lyrics with news, video, music, downloads and MTV biography of singers and groups. Highly recommended.
http://www.learnenglish.org.uk/songlyrics_frame.html

A professional site designed by PhD Professor Rong Chang Li. The listening section contains links to conversations, idioms, broadcast sites among others. Highly recommended.
http://www.rong-chang.com/

BBC Radio 4
http://www.bbc.co.uk/radio4/