BMP2Sixel
Convert BMP images into Sixel images
...The original BMP2SIX program written April 2001, now is updated to compile under PellesC, and provides a GUI interface. BMP2SIX output examples can be found on SourceForge under the SixelViewer program at this location, https://sourceforge.net/projects/sixelviewer/files/Sixel_Pics/
Release date 10/31/2022 version 1.2 adding Sixel HLS as an output option