KoboldAI

Run by small, humanoid lizards. And KoboldHenk. Currently on version 17.

For the low cost of free, you can deal with a moderate amount of technical bullshit and enjoy a more than adequate /aids/ experience.

Can be run locally, because you have nothing to hide, if you have enough memory (you probably don't; if you do run it on system memory and/or CPU expect to wait minutes in between responses from the AI) or on Google Colab. Colab offers access to hardware to run powerful 13B models, but be prepared to hurry up and wait for multi-GB downloads and tensors to get tense.

Now supports Userscripts and Modules, except they call them by their proper name, Softprompts.