I may be experiencing a fluke, but it appears that my university's library's website allows any computer to use it as proxy for viewing and downloading articles from many paywalled sites (in fact, every site it gives me access to with my student login, which is a very large selection). I only discovered this by accident, and I'm hoping it isn't unintentional on their part. If anybody is interested, the address is here. If you try it and it doesn't work, please tell me.

ETA: It appears that my browser simply cached my login, and that this service is unfortunately not actually available to the general public. Sorry for any confusion.