One of the most popular free S60 calculators is now available for Symbian S60 3rd Edition phones. Owners of the new Nokia smartphones will certainly want to use it as it is much faster to use than regular, built-in calculator. By using directional keys to allow quick access to the basic math operators, Calcium significantly lowers number of required clicks for basic calculations. For instance to calculate 4/5 x 7 on a built-in Nokia calculator you should spare 13 clicks. On the other hand with Calcium number of clicks drops to 6!
Calcium is free and a must-have in your phone. You can get it from here (version for S60 1st and 2nd Editions are also available).