HELAPIx is designed to have pixels of the same area, and Dymaxion is designed to have the least distortion.
[0]: http://healpix.jpl.nasa.gov/
[1]: https://en.wikipedia.org/wiki/Dymaxion_map
[1]: http://www.win.tue.nl/~vanwijk/myriahedral/
[2]: http://www.win.tue.nl/~vanwijk/myriahedral/CAJ103.pdf
[1]: http://www.win.tue.nl/~vanwijk/myriahedral/
[2]: http://www.win.tue.nl/~vanwijk/myriahedral/CAJ103.pdf