A Língua Portuguesa (a history of the Portuguese language in Portuguese, English and French): http://www.linguaportuguesa.ufrn.br/

Os sons da Língua portuguesa / The pronunciation of the Portuguese of Portugal
http://www.rudhar.com/foneport/en/foneport.htm

Online Portuguese lessons
http://www.bbc.co.uk/languages/other/portuguese/talk/
http://www.portugueseclasses.com/
http://alfarrabio.um.geira.pt/spl/index.html
http://www.sci.fi/~huuhilo/portuguese/
http://www.geocities.com/email_theguy/newportweb/porthome.htm
http://www.easyportuguese.com
http://www.learningportuguese.co.uk
http://www.learn-to-speak-portuguese.com/free-online-lessons.html
http://learnportuguese.elanguageschool.net

Online Portuguese dictionaries
sozluk.net
http://www.dicionarios-online.com
http://www.priberam.pt/dlpo/dlpo.aspx
http://biblioteca.uol.com.br/
http://www.freedict.com/onldict/por.html

Portuguese-English Electronic talking dictionaries
http://www.ectaco.com

Online Portuguese language radio
http://www.musikcity.mus.br/radiosdobrasil.html
http://www.radios.com.br
http://www.rtp.pt
http://www.bbc.co.uk/portuguese/

Online Portuguese language newspapers
http://www.expresso.pt
http://dn.sapo.pt
http://www.dm.com.br
http://oglobo.globo.com
http://www.uol.com.br
http://www.uol.com.br/fsp
http://www.agestado.com.br
http://www.estadao.com.br
http://www.bonde.com.br

Comunidade dos Países de Língua Portuguesa
http://www.cplp.org