ESRGAN - ESRGAN is an upscaling method that is capable of generating realistic textures during single image super-resolution.
waifu2x - Online/Offline tool to upscale images
Anime4K - A High-Quality Real Time Upscaler for Anime Video
Cupscale - Image Upscaling GUI based on ESRGAN
MMEditing - Open-source image and video editing toolbox based on PyTorch.
Video Enhance AI - This post offers you a list of video enhancer, even including video quality enhancer powered by AI. Find out how to upscale video here.