General Information:
EU-Community: http://eu-community.daad.de/index.php?id=61
EURES-Portal: https://ec.europa.eu/eures/main.jsp?acro=lw&lang=de&catId=490&parentId=0
General Tips: http://karriere-journal.monster.de/
International Student Placement Office: http://www.ispo.co.uk/students/

Visa: 
Visa types and requirements: https://www.gov.uk/browse/visas-immigration 

Entry and residence requirements:
UK Border Agency: bia.homeoffice.gov.uk/...

Social insurance provisions:
Department for Work and Pensions: dwp.gov.uk/...
Euraxess: britishcouncil.org/...

Tax regulations:
HM Revenue & Customs (HMRC): hmrc.gov.uk/...

Accommodation:
Just landed - Housing & Rentals: justlanded.com/...
Finding Flatmates: spareroom.co.uk/...
Easy Roommate: uk.easyroommate.com/...
Norhern Ireland: rent-let.vivastreet.co.uk/...
Bed & Breakfast: bedandbreakfasts.co.uk/...

Country information:
Wikipedia: wikipedia.org/...
Culture Crossing - England: culturecrossing.net/...
Culture Crossing - Scotland: culturecrossing.net/...
Culture Crossing - Wales: culturecrossing.net/...

Further information:
Visit Britain: visitbritain.com/
Tourist information: tourist-information-uk.com/...