Just got a cheap chinese clone of the "STM32-BLUE PILL" (which has a black pcb for some reason, yeah I was confused too for the first time but this board has the
Getting Started with STM32F103C8T6 Blue Pill | Program with Arduino IDE
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Blue Pill Breakout/I2C Hub PCB Only from Land Boards, LLC on Tindie
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Blue Pill Vs Black Pill: Transitioning From STM32F103 To STM32F411 | Hackaday
stm32f103 bluepill 3D printer control board - EasyEDA open source hardware lab
Remaking the STM32 Blue-Pill – Part 1 - Maker and IOT Ideas