Geekboy1011 over at the Cemetech forum has been working on a Silverlink clone software for the Arduino Leonardo (ATmega32U4) microcontroller development board:
Texas Instruments’ Silverlink is a product to connect calculators without USB ports (namely everything except the TI-84 Plus series and the TI-89 Titanium) to computers’ USB ports to transfer files, screenshots, and operating systems.