This is a very basic e-reader with no dedicated picture viewer or anything else. (goodereader.com)
I'm not sure why Amazon didn't make it public (maybe because paging is kinda slow), but there is a basic picture viewer in Kindle. (manga.jadedragononline.com)
Apart from PDF support, changes to font size dialog, picture viewer mentioned above and additional game mentioned below Kindle software remains the same. (ereadertech.com)