A collection of links to Criminology sites, societies, journals, instututes and related organisations across the world:
(Please note that some of these links go to non-English sites, although most have English versions available (and easily findable) on their homepage)

Research Institutes:

Transcrime (Italy) – http://transcrime.cs.unitn.it
eCrime (Italy) – http://www.ecrime.unitn.it
Centre for the Study of Democracy (Bulgaria) – http://www.csd.bg/

Journals:

Internet Journal of Criminology – http://www.internetjournalofcriminology.com/

Websites:

Crime and Society: a comparative criminology tour of the world – http://www-rohan.sdsu.edu/faculty/rwinslow/index.html
Green Criminology – http://greencriminology.org/
The Judicalis Group – www.judicalis.org

Government and Intergovernmental:

United Nations Interregional Crime and Justice Research Institute (UNICRI): http://www.unicri.it/
United Nations Office on Drugs and Crime (UNODC): http://www.unodc.org
Eurojust: http://eurojust.europa.eu/
Europol: https://www.europol.europa.eu/
Interpol: http://www.interpol.int/

Other (non-criminology) sites of interest:
Web Directory – http://www.all-blogs.net
ASR – http://www.activesearchresults.com