https://github.com/AUTOMATIC1111/stable-diffusion-webui

Stable diffusion, Pc requirements are quite high but no worries there's a lot implementations for different machines. 

 https://github.com/easydiffusion/easydiffusion

https://github.com/godly-devotion/MochiDiffusion

https://github.com/easydiffusion/sdkit

So choose the one that works best for your pc