XRoar - Windows (32bit)  XRoar - Windows (64bit)  XRoar - Mac  XRoar (Source)

What's New:

Allow larger or smaller picture areas to be selected, showing more or less border. It also introduces optional 60Hz scaling, stretching pictures vertically to reproduce the image shape more familiar to users in 60Hz regions (where fewer vertical lines span the same vertical space). Both of these can be adjusted in the TV Controls dialog (or through menu options in the case of Mac OS X+). MPI slot configuration is now per-cart rather than global, and you can save screenshots in PNG format if built against libpng. In addition, a few CoCo 3 cartridge games that did not work before now do.