Eclipse and anything based on it can burn in the depths of hell
Sorry for the late reply,
you might want to have a look here http://www.stm32duino.com/
I guess nobody wants to build big projects with it, but for simple projects it's ok.
My Students had a good and easy start with it.
If you want to spend some money Keil and IAR are very good solutions.
I worked with both (not stm32 projects) and in my opinion IAR is a little more
"straight forward".
best regards