There is - I have one here, which could be very easily imported.
I think the thing that would set us apart would be to encompass ALL the common misspellings..
i.e. not just tomorow corrected to tomorrow, but also tommorow and tommorrow
This is easily done using regex:
to{1,2}mor{1,2}ow -> tomorrow
Corrects: tomorow, tommorow, tommorrow -> tomorrow
And the more I look at the word "tomorrow" the stranger it looks...