Original code can be found at the TI page for the TRF7960
The patch for the Texas instruments firmware (sloc136.zip)
The patch for the Texas instruments GUI (sloc135.zip)

the firmware compiles on linux (mspgcc) and windows (IAR Workbench). See README-gcc.txt
While the GUI can be used with wine, no support for compiling on linux exists yet
There is also RFIDread.exe for the impatient

This is a bootloader for the MSP430 microcontroller that allows flashing the EEPROM via the serial port which on the TRF7960 is connected to the USB, so you do not need a programming device. Well that is, after you have programmed the bootloader.