My brother told me about this and I really like too.
http://3dporch.com/It has 3d images you can save onto your 3DS and view via the web browser. It also lets you look at it on your pc in different ways. It wiggles the image to give you the impression of 3d, and it also has different modes you can view stuff. It's all user generated and has tons of quality pictures to see. It's easy to upload your own pictures and share them with others.
This individual I love his work:
http://3dporch.com/users/oriotoDeviant Art high detail pictures of videogame scenes, they look great in 3D and I saved almost all of them on my SD card.
My account is:
http://3dporch.com/users/adv2k169So you can look at my work. Sadly the website does not let you vote pictures so its just a bunch of galleries but still worthy thing to look at