Citibank has a student card that I got when I went to college to build my credit. The credit line was very low, but it didn't matter because I only charged things I could pay off in full. I didn't have to have a parent co-sign and I just had to prove I had a bank account to get it. I did a lot of research to find a good card and am glad I picked this one.
The card also offered special student "discounts" on certain websites and stores. Porbably an effort to get you to spend more, but it was worth it when I had to buy textbooks from barnesandnoble.com
Statements were also broken down by category (Merchandise, Services, Gas, Food, etc.) to help track where you were spending. Citibank also occasionly send out helpful little pamphlets like "A Student's Guide to Using Credit Wisely" and "Budgeting 101" or something like that. Overall, I feel it was a great card for a college student. I actually still use the card and Citibank increased my limit several times because I paid it off in full each month.
I've been very happy with Citibank and I'd recommend them to anyone.