Quadrilateral Cowboy uses the TGA image format.
Unfortunately for me, Windows’ default image viewer doesn’t support TGAs. I looked online for a free lightweight image viewer, but it seems TGA isn’t a popular image format and/or my Google search skills aren’t that hot.
So, I made an image viewer for TGA files. If you need an image viewer that views one and only one image format, well, I got you covered.
Written in C# and uses the SFML library.