Are there applications of modular forms to areas other than Number Theory (and Galois Theory) such as Combinatorics, Algebraic Topology, Algebraic Geometry, Theoretical Physics,...?
closed as not a real question by HJRW, Andy Putman, Ryan Budney, Pete L. Clark, Yemon Choi Oct 7 '10 at 5:19
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I am by no means an expert, in fact I don't really know what a modular form is! But yes.
or if you want more,
You may want to try asking a more specific question if there's something you've been wondering about. Otherwise is seems a bit too vague to really address here.