From the site:
"This site aims to help anyone who is learning Portuguese as a foreign language.
I tried my best to make it complete, easy, clear and as simple as possible.
As a Brazilian native speaker and teacher, I focus on Brazilian Portuguese. However, this site can also be useful for those who are learning European Portuguese."
Lots of good materials here, including interactive stuff, pronunciation, grammar, phrases, slang, cartoons, proverbs, tests. The materials were assembled by Sonia Celegatti Althoff, a long-time professional Portuguese teacher.