National/General
Campus Career Center
Internships.com (sign up for internships to be e-mailed mailed to you!)
Career Builder (search interns)
JobTrak
Job Resource
National Association of Colleges and Employers
Federal Government Internship Programs
Vault.com (search intern) Great for Business Majors!
Collegegrad.com
Intern Web
Internjobs.com
Cities/ International/Summer
Pittsburgh Technology Council
Federal Government Internship Programs
BigApplehead.com
ClevelandIntern.net
InternAbroad.com
StudyAbroad.com
Rising Star Internships
Resort Intern Connections
Peterson's Great Summer Jobs
Erie Chamber of Commerce (company leads, not internships)
Various Fields
TechInterns.com
Premier Health & Fitness Resources
Federal Government Internship Programs
University Park (various department contacts and internship ideas)
University Park Science Co-op
University Park School of Engineering Co-op Program
Education jobs/internships
Magazine.org
INROADS (for minority students)