I was also looking for similar themes and have found the following:
*Flat (by rayford85).
*MIUI v5 (There are three: 1- orange on white. 2- orange on black. 3- holo blue on black).
Edit:*Flow (is also a great theme).
And I agree with meatboy, Gem Flat and Simplex (both red and blue) are one of the best themes out there.