For all STM32Fx C/C++ developers, ST has acquired Atollic True Studio. Now you can dowload and use Atollic True Studio for STM32 v9.0.0 free of charge. This is Pro edition for STM32 chip.
Atollic True studio for STM32 download
More info:
http://www.st.com/content/st_com/en/about/media-center/press-item.html/c2839.html