the photo in burden.ppm is "selective focus photography snowflakes" by aaron burden. it can be found online at https://unsplash.com/photos/selective-focus-photography-snowflakes-9yhy1FXlKwI. its license can be found online at https://unsplash.com/license. the icon in pointer.ppm is by me :). it is released under the cc0 1.0 universal public domain dedication (https://creativecommons.org/publicdomain/zero/1.0/). the font in terminus-bold-18x10.psf is the "terminus" font, in bold weight, at 18x10. it can be found only at https://terminus-font.sourceforge.net/ and is under the license in terminus-ofl.txt (the sil open font license v1.1).