sdxc
There are 2 repositories under sdxc topic.
relan/exfat
Free exFAT file system implementation
usbtool/formatusb
The FormatUsb tool is a reliable way to format USB flash drives, such as USB keys/pendrives, memory sticks,SD Memory Card, SDHC Memory Card and SDXC Memory Card SD/SDHC/SDXC Cards