The flags of all countries available as PNG and SVG.
Easiest way to get them is to clone the git repository:git clone firstname.lastname@example.org:hjnilsson/country-flags.git
Or go to the Github page to read more
Kosovo is listed as XK. This is a user-assigned code per IOS-3166, and is in use by several multinational organizations.
Made by Hampus Nilsson.