There are 2 repositories under sixel-graphics topic.
Modern C++ Terminal Emulator
encode images to iTerm / Kitty / SIXEL (terminal) inline graphics protocols
A collection of packages for U++ framework.
*Good* Image Protocol - a formalization of a proposal for a new image protocol for virtual terminal emulators
LaTeX to SIXEL conversion
Atlast Forth for Raspberry Pi Pico and PicoW
The home of Ultimate++ terminal widget, TerminalCtrl, an easy to use yet powerful cross-platform terminal emulator widget written in C++.
Utility for Synchronet BBS that lets users view nearly any image in sixel format in SyncTERM.
Sixel image decoder and StreamRaster interface for for U++