CTURNER  This is a terrifically useful software. The music/background sounds are relaxing, soothing and can help with studying and concentrating. They are also very useful for just relaxing. Recent updates improved functionality and user tweaking. You can adjust lots of parameters to get the effect you want or just select from the wide variety included. Developer is very responsive and friendly. Highly recommended  
(Version 4.8.6.2)

CTURNER  This app continues to improve steadily. I get excellent results and the developers are consistent and responsive. This is an excellent app if you need voice recognition (not speech of text or such, a different thing) and you are willing to get the right combination of hardware and put in the necessary training. MacSpeech is doing it right and the upgrade prices are absolutely fair.  
(Version 1.7.0.4)