Prisma - or as a nerd might call it, !(#nofilter)Prisma is a smartphone app (free) that is pretty much the opposite of #nofilter. It's kind of like having some of the "artistic" filter effects of a more sophisticated image editing program without any of the fine-tuning controls.
The end result is that when things look good - they look good...and you may have to try five or six filters that look horrible before you find the one(s) that look good. And because the processing is apparently done server-side instead of on the phone, it is... not fast.
But regardless, it's free, so you can grab it for iOS or Android.