SCons is a top notch build system. It's dependency approach is both modern and effective. Written in Python, it can be extended very easily. It can even be configured to use make's deprecated dependency resolution for people that can't leave the 80's.
I installed Python 3.4 because it was required, but when I installed SCons, I couldn't find it on my computer. I thought it would be a program creator or something.
There are no 2 star reviews.