Hal_Posoyan:
I daresay Pololu have a suitable one here.But why do you need a library to use a 293?
The Y outputs follow the A inputs: make eg input 1A high and output 1Y goes high. Write a couple of functions (forward(), reverse(), whatever) in your sketch to make the right pins high and low to get the right motor directions.
You could make the conversion of such functions to a library into a more advance exercise.
In the Brazil, the products POLULO not are easy of buy.
But i agree with you, i will go study e buy the polulu for projects future.