chaiNNer

There's also https://github.com/chaiNNer-org/chaiNNer if you want to run arbitrary models. https://openmodeldb.info/ has a great array of them to choose from.

There are actually a number of more-or-less node/graph-based image editors: # chaiNNer Fully node-based image processing. https://github.com/chaiNNer-org/chaiNNer # vkdt Node-based raw and video editor. Sort of the evolution of darktable, by the original developer. https://jo.dreggn.org/vkdt/readme.html # darktable The graph is strictly linear (single input, single output), but you can change the order of the processing and insert new nodes as you want. https://www.darktable.org Pretty sure there are some others, but those are the three I can remember right now.

For anyone interested in different upscaling models, there is a collection in the wiki here: https://upscale.wiki/wiki/Model_Database My personal favourite is Remacri for photographs, but you should download a few of them and try what works best for the photo/image you have. You can use either Automatic1111's repo for stable diffusion to try them out (put the model file in the ESRGAN directory), or also chaiNNer (https://github.com/chaiNNer-org/chaiNNer)