BMP2Sixel
Convert BMP images into Sixel images
This is a console application but also has an optional GUI interface.
Converts a BMP with 256 colors or less into the Sixel format. Sixel supports a maximum of 256 colors although many terminals only support 16 colors. If your BMP has more than 256 colors, or fewer colors but uses greater than 8 bits per pixel, reduce the color count using a program like IrfanView and "Decrease Color Depth".
This program and its older brother PCX2SIX (circa 1995) are responsible for many...