I can think of white greek Skydancer and Bow Tie, white Windy, german Starshine (alt. pose, has two versions: metallic/non-metallic symbol), italian Majesty/Re Unicorno. Italian Polly, italian Lemon Drop with lilac hair. Scandinavian NSS Truly and Cupcake are white as well.
Both Italian and UK white Tootsie, or the white Venezuelan one. Argentinian white Snuzzle, Lickety Split, Twilight and Sparkler.
Some of the other venezuelan ponies like Blossom, Cherries Jubilee or Lickity Split suit that category as well -->
http://mylittlewiki.org/wiki/VenezuelaAaand: spanish Cupido (white Peachy/Snuzzle version with blue hair), South African Heart Throb (one may always dream)