University of Ohio, excellent image bank:
https://instruction.cvhs.okstate.edu...docs/clinpara/

Worms and Germs blog, maintained by a parasitologist. Current parasitology news, updates, etc:
http://www.wormsandgermsblog.com/

Companion Animal Parasite Council, veterinary resources:
http://www.capcvet.org/

American Heartworm Society:
http:www.heartwormsociety.org

University of Pennsylvania Parasitology Image bank:
http://cal.vet.upenn.edu/projects/pa...site/index.htm

All about C. elegans:
http://www.wormbook.org/

I have a bunch of resources that I'll post once I get back to my laptop. But these are the ones I could think of off the top of my head.