Chafa is an open source project that lets you visualize images on the command-line by converting them to Unicode characters ("ASCII art") with colours. It's available in many Linux distros, as well as Homebrew for macOS. What a find!
I work on image processing and generally do mosh + tmux + cli tools. I have to run servers on my workstation to view images (or use jupyter notebooks). This would seriously simplify some basic debugging workflows for me!
I really wish there was a standard pixel format for terminals that was better than sixel. iTerm2 and kitty each have their own custom mechanism, but AFAIK, they are the only ones that use their respective protocols.
It's very actively maintained by someone who cares a lot about features and user experience. In fact I've switched to wezterm right after a current Alacritty maintainer rejected my little pull request that excluded fancy newline signs and stuff from the default URL characters list.
Aside from cool features, the renderer is better too, IIUC it's already using lots-of-quads like a proposed alacritty improvement in a long unmerged PR.