IRISH ASSOCIATION  PORTUGAL– http://irishassociation.org/
EXPATS PORTUGAL – http://expatsportugal.com/
EXPATICA – http://www.expatica.com/pt/
INTERNATIONS-  http://www.internations.org/
BRITISH COUNCIL – http://www.britishcouncil.org/portugal.htm
BRITISH COMMUNITY CENTRE – http://www.bcclisbon.org/
BRITISH COMMUNITY COUNCIL, LISBON – http://www.bcclisbon.org
THE ROYAL BRITISH CLUB – http://www.royalbritishclub.pt
THE ENGLISH  SPEAKING UNION OF PORTUGAL- http://www.esu.org/portugal
AMERICANS IN PORTUGAL – http://www.americansinportugal.com

Useful links:

EMBASSY OF IRELAND IN PORTUGAL – http://www.embassyofireland.pt/
BRITISH EMBASSY IN PORTUGAL- http://ukinportugal.fco.gov.uk/en/
EMBASSY OF THE UNITED STATES IN PORTUGAL – http://portugal.usembassy.gov/