Rx Outreach | Patient Assistance Program, Discount Prescription Drugs and www.xubec.com have discounted meds, often greatly discounted. Rxoutreach has been much more useful for me.

Prices, Coupons and Information - GoodRx lets you compare prices between different pharmacies and gives any available coupons to you right on the site.

I'd use goodrx first to trial drugs and then try to buy it through the other programs if possible. I've had drugs come down 80% or more on rxoutreach.