MagicNodes for After Effects. A license is $89 for a basic license and only corrective updates, or $149 with Premium with 1 year free maintenance, learning center, and $69 a year maintenance after the first year.
I have not given this a try but would like to. I really loved node based compositing in Shake, and then in DaVinci Resolve, so the ability to have it in after effects is amazing.