Here is a list of some widely used email clients, in alphabetical order by operating system.
Mac OS:
Microsoft Windows:
Unix/Linux:
Palm OS:
Pocket PC:
... 0.00% Native American, 0.67% Asian, 0.00% Pacific Islander, 0.00% from other races, and 0.54% from two or more races. 1.48% of the population are Hispanic or Latin ...