What problems have you solved using artificial neural networks?
I'd like to know about specific problems <b>you</b> - the SO reader - have solved using artificial  neural network techniques and what libraries/frameworks you used if you didn't roll your own.

Questions:

* What problems have you used artificial neural networks to solve?
* What libraries/frameworks did you use?

I'm looking for first-hand experiences, so please do not answer unless you have that.
What problems have you solved using artificial neural networks?
===

I'd like to know about specific problems <b>you</b> - the SO reader - have solved using artificial  neural network techniques and what libraries/frameworks you used if you didn't roll your own.

Questions:

* What problems have you used artificial neural networks to solve?
* What libraries/frameworks did you use?

I'm looking for first-hand experiences, so please do not answer unless you have that.