Here's a list of Japanese animation available as Video on Demand (VOD) on Amazon.com.

There are rental as well as purchase options, often cheaper than getting the disc itself. That said, they aren't free like the torrent, fansubs or other shady downloads.

Note that these videos can be streamed directly from the web browser, or downloaded to your computer (some restrictions) for viewing. Rentals have a 2-day viewing period.