ImageOptim - Faster web pages and apps.
waifu2x - Online/Offline tool to upscale images
XnConvert - XnConvert is an easy image converter for graphic files, photos and images available on Windows...
A.I. Gigapixel - AI based image resizer
JPEGmini - JPEGmini - The Photo Optimization Tool Trusted by Tens of Thousands Image Perfectionists
AI Img Enlarger - Enlarge Images Without Losing Quality Online