There are 1 repository under dfu-mode topic.
Secure USB DFU1.1 bootloader for STM32
Custom STM32xx bootloader for easy USB flashing
Secure USB DFU1.1 bootloader for STM32 with STM32F4x1xE target fully compatible to STM32duino and PlatformIO
Arduino core for BSFrance STM32 boards
Arduino keyboard library :floppy_disk: