Virtual ANS is one of my personal favorite apps.
Okay admit that it is not for everyone but it is full of potential and would say the most unique app you can get. If you want to try it out first for free it is for free for PC/Linux/MAC and downloadable at warmplace.ru.
Nature Oscillator is more fun to play with than I suspected and it took me some time before I got it but for generating interesting videos and Ambient soundscapes it is worth investing a little bit of money.
The sale is until the tenth of October...