Estonia

General Information:
EU-Community: http://eu-community.daad.de/index.php?id=57
EURES-Portal: https://ec.europa.eu/eures/main.jsp?acro=lw&lang=de&catId=490&parentId=0

Visa:
Visa types and requirements: https://vm.ee/en/taxonomy/term/41

Entry and residence requirements:
Estonian Ministry of Foreign Affairs: vm.ee/...

Social insurance provisions:
Ministry of Social Affairs: sm.ee/...

Tax regulations:
Ministry of Finance: fin.ee/...
European Commission: ec.europa.eu/...

Accommodation:
Homes and Property: http://www.myhome.ee/ 

Country information:
Wikipedia: wikipedia.org/...
Culture Crossing: culturecrossing.net/...

Further information:
Tourist information: visitestonia.com/...
Lonely Planet: lonelyplanet.com/...