Though the time to look for the best internships has passed, many may still be looking for something for this summer. 
A new website, Intern Match, says that
By focusing on attracting a high volume of smaller organizations, InternMatch will greatly increase the number of opportunities and diversity of choice available to students. The InternMatch Platform will also act as a one-stop-shop for finding/applying for opportunities, communicating with organizations, and building a professional profile that will showcase interests, talent and experience.
Students who want to volunteer will find that InternMatch allows them to combine community impact with career-building. Internships for nonprofits allow socially-conscious students to maximize social impact, build their resumes, and gain critical real world experience.
Worth a try, if you are in the market for an internship.