I am using a QVGA size (320*240) TFT LCD named T-55596-ABN from Optrex. I am looking for a open-source LCD driver for this LCD. Could anybody please provide me a link or info?

BTW, I searched "LCD Driver" at SourceForge, got 17 results, but I have no idea which one is the right one based on their description.

Thank you in advance.

Try hackaday community for that kind of stuff. You might get lucky. But if you have the LCD specs for it, might as well write your own? Of course I'm assuming you are doing some kind of embedded work.