Top 4 ftdi open source projects

FT2232ImageOutput
Drawing images on oscilloscope using ft2232hc chip
uart-audio
Audio out with an FTDI UART cable
csr-spi-ftdi
USB SPI programmer/debugger for CSR BlueCore bluetooth chips, based on FTDI USB to UART converter, for Linux and Windows
Quad-Serial
Quad serial project with FTDI CI's, Isolation and 1.8~5.5v UART port.
1-4 of 4 ftdi projects