General Information:
EU-Community: https://www.daad.de/de/laenderinformationen/
EURES-Portal: https://eures.ec.europa.eu/index_de
Visa:
Visa types and requirements: https://www.expatica.com/pt/moving/visas/portugal-immigration-105233/
Entry and residence requirements:
Ministry of Foreign Affairs: https://www.portugal.gov.pt/pt/gc23
Working in Portugal:
Eures - The European Job Mobility Portal: https://eures.ec.europa.eu/index_pt
Social insurance:
Anglo Info: https://www.angloinfo.com/portugal
Accommodation:
Rooms in Portugal: https://www.expatarrivals.com/europe/portugal/accommodation-portugal
Flats in Portugal: https://www.idealista.pt/en/properties-for-sale-in-portugal
International Accommodation Agency: https://www.fineandmine.de/
Country information:
Wikipedia: https://en.wikipedia.org/wiki/Portugal
Further information:
Tourist Information: https://portugalvirtual.pt/index.php#.VRQWSOHpz2k
Visit Portugal: https://visitportugal.com/en