Drivers
Virtual COM Port driver for Uart-USB converter CH340x [Windows]
Virtual COM Port driver for Uart – USB bridge CP210X [Windows]
USBASP AVR programmer firmware and USB driver
Driver for 07301 Uart-USB converter [Windows]
Tools
STM32 Flash Loader Demonstrator
Tera Term – a terminal emulator. Use it for file transfers from device to PC
AVRUBD – Windows application for upgrading firmware via bootloader
USBASP AVR programmer supporting software [For Windows, in English]
USBASP AVR programmer supporting software (progisp167) [For Windows, in Chinese]
USBASP AVR programmer supporting software (progisp172) [Recommended] [For Windows]