The STM32 Open Development Environment (STM32 ODE) is open & compatible with a number of IDEs including IAR EWARM, Keil MDK, mbed and GCC-based environments.

• STM32 Nucleo development boards
•  STM32 Nucleo expansion boards
• STM32Cube software
• STM32Cube expansion software
• STM32 ODE Function Packs

http://www.st.com/web/en/catalog/tools/FM146/CL2167?sc=stm32ode

STM32CubeMX software download

http://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-configurators-and-code-generators/stm32cubemx.html