STM32F107VC ARM-based 32-bit MCU with 256 KB Flash of on-chip Flash memory, up to 64 Kbytes of SRAM. The STM32F107VC includes USB OTG, Ethernet, 10 timers, 2 CANs, 2 ADCs, 14 communication interfaces.

The STM32 Nucleo board provides an affordable and flexible way for users to try out new ideas and build prototypes with any STM32 microcontroller line, choosing from the various combinations of performance, power consumption and features. The ArduinoTM connectivity support and ST Morpho headers make it easy to expand the functionality of the STM32 Nucleo open development platform with a wide choice of specialized shields.
The STM32 Nucleo board does not require any separate probe as it integrates the ST-LINK/V2-1 debugger and programmer.
The STM32 Nucleo board comes with the STM32 comprehensive 

The STM32 Nucleo board provides an affordable and flexible way for users to try out new concepts and build prototypes with the STM32 microcontroller, choosing from the various combinations of performance, power consumption and features. For the compatible boards, the SMPS significantly reduces power consumption in Run mode.

The Arduino™ Uno V3 connectivity support and the ST morpho headers allow the easy expansion of the functionality of the STM32 Nucleo open development platform with a wide choice of specialized shields.

STM32F103C8T6 ARM STM32 Minimum System Development Board Module For Arduino

STM32F103C8T6 ARM STM32 Minimum System Development Board

Core103Z is a small STM32 development board that features an STM32F103ZET6 device as the microcontroller, supports further expansion. It is ideal for starting application development with STM32F family.

XCore407I is an STM32 MCU core board that features the STM32F407IGT6 on board.

Going from TTL to RS485 is made simple by this prototyping friendly module. On one side of the board are the TTL IOs, and on the other are the RS485. At the core is a MAX485 which is powered by 5V. (google Max485 RS485 Module)

A 0.96 inch I2C OLED display with 128*64 blue pixels and very good viewing angles of at least 160 degrees.