GiantCowFilms offers another 'full contrast' HDR, under a CC0 license.
After Greg Zaal posted the Mpumalanga Veld HDR, I thought I simply had to give it a shot. I purchase an ND filter and set out to shoot one. I finally got one worth sharing. It has 22.4 stops of dynamic range, and captures the full brightness of the sun. I have also licensed it with the CC0 license, meaning that you can share and use it however you want.