InternXchange — an internship site for college students, who you can post your profile (resume) and search for potential internships throughout the U.S. You must register before you can use any of the services. Free to job-seekers.
Intern Zoo — an internship site for college students, where you can search for internships (by location, company, industry) and apply directly to them, as well as find some basic job-hunting and internship tips. No cost to job-seekers.
JobWeb’s Summer Work, Internships, Fieldwork, and Postgraduate Options — a great collection of resources, with more than two dozen links to summer jobs and internship postings.
Rising Star Internships — where college students can search for internships and/or post their resumes.
Snag A Job — a job sites for high school and college students looking for part-time, seasonal, or summer jobs. Search for a job by type of job or by location, and than apply online. Free to job-seekers.
Student Search System, Inc. — Specializes in finding internships and entry-level employment for college students and graduates.
SummerJobs.com — where summer job-seekers can search by keyword or location for summer jobs. A very nice resource.
Washington Center for Internships and Academic Seminars — through its programs, students can earn academic credit while they gain practical experience, discover professional strengths and weakensses, and evaluate career paths.