STM F4 Discovery IDE

Install CooCox IDE CoIDE-1.7.8

Install GCC ARM compiler gcc-arm-none-eabi-6_2-2016q4-20161216-win32

Install STM32 Link utility (Installs drivers as well) is file en.stsw-link004

When you go to build your project, it will ask for the path to the compiler, complete that and you are away