Modular forms software
William A. Stein
My Software:
SAGE: System For Arithmetic Geometry Experimentation
HECKE: Modular forms calculator
Source code for my MAGMA modular forms packages
(these are included with
MAGMA
)
A GP/PARI Hecke operators calculator
Hijikata trace formula
 
Other People's:
Verrill's fundamental domain drawer
(
local mirror
)
Peter Green's Heegner Points Package
(
local mirror
)
Qing Liu's Genus Two Reduction
(
local mirror
)
ComputeL - Computing special values of L-functions by Tim Dokchitser
(
local mirror
)