I used a few of @brianeno's back in the day: Bloom and Trope, IIRC. But I remember one (perhaps not Eno's) that used ambient sounds...

...from your phone's microphone and incorporated them into the music.

This was back in 2007 IIRC. Not sure what it was called or if it still exists.

It was less melodic and more rhythmic in the music it generated. But I loved the concept of your environment being sampled in real time...

...and looped into generative music playing in your headphones.