Brazilpod Portuguese lessons and audio files from the University of Texas.
Brazilian Portuguese Introduction to grammar and basic phrases.
Forvo.com Portuguese Pronunciation Audio clips of native speakers pronouncing over 99,000 Portuguese words.
Pimsleur Brazilian Portuguese Audio course available at Duke University Libraries.
Portuguese in Transparent Languages Online is a rapid language instructional system for learning over 70 languages; provides flash cards, blogs, words of the day, language overviews, and active social language.