What are some alternatives?
When comparing RNI Films and CSSGram, you can also consider the following products
infltr - Discover Infinite Filters for every Picture!
Filtron - Create and share your own photo filters on Mac & iPhone
CSSCO - VSCO Filters with CSS
BitCam - The world's most advanced camera for your pocket computer
Instagram.css - Complete set of Instagram filters in pure CSS
Carbon - Create and share beautiful images of your source code.