FilterJS is described as 'Node-based procedural texture generator, meaning that you will compose your filter, generator, or algorithm to make a texture – you name it – out of special blocks. Each filter has two unique blocks: an input image and an output image' and is an app in the video & movies category. There are more than 10 alternatives to FilterJS for a variety of platforms, including Windows, Mac, Linux, Java Mobile and Steam apps. The best FilterJS alternative is InstaMAT. It's not free, so if you're looking for a free alternative, you could try InstaMAT or Patternshop. Other great apps like FilterJS are PixPlant, NeoTextureEdit, Imogen and Filter Forge.