Macfly is a tool allowing you to run one or more
programs with a shifted clock compared to the
system clock. The programs have the same shift and
are synchronized at the same time. You don't need
to recompile your application, and normal users
are allowed to use it. It's possible to change
clock speed (a faster/slower/reverse clock). Usage
examples: reduce game speed, send email in the
past/future, test a program, etc.
