They may have been under development during Ballmer's time, but it's hard to believe that they would've seen the light of day under Ballmer's leadership. And if Ballmer released any open sourced products, I get the feeling that there would be major strings attached. And it would have a switch and bait sort of feel to it. Kind of like Oracle with Java and other technologies from Sun.

The fact is, Nadella has made open source a lot more palatable from Microsoft.