Wikipedia: Portuguese language
- Article in the online collaborative encyclopedia. Information on history of the language, geographic distribution, vocabulary, phonology, grammar and useful links. Includes audio samples of different dialects.
- http://en.wikipedia.org/wiki/Portuguese_language

BBC: Languages: Quick Fix Portuguese
- Includes useful phrases and a short language course for travelers. With audio.
- http://www.bbc.co.uk/languages/other/portuguese/quickfix/

Collection of Tongue Twisters
- A collection of Portuguese and Brazilian tongue twisters, with approximate translations.
- http://www.uebersetzung.at/twister/pt.htm#T1

Learn Verbs
- Audio guide for over a hundred Portuguese verbs conjugated in six different verb tenses. Also available in six other languages.
- http://www.learn101verbsin1day.com/guide_portuguese.php

Type Portuguese Characters Online
- Web-based text editor with buttons and keyboard shortcuts.
- http://portuguese.typeit.org/

The Portuguese Language
- Language, history, and evolution of the language, and an account of regional usage.
- http://www.linguaportuguesa.ufrn.br/

Brazilian Portuguese
- Minilessons in grammar and everyday phrases. Searchable site; also reading resources, sound files, and links.
- http://home.sci.fi/~huuhilo/portuguese/

Portuguese Idioms Literally Translated
- Compiled, translated, and explained in English by Tágide Crista.
- http://www.tagide.com/pt-idioms.html