SBaGen is free software, and should come with various waveform scripts you can experiment with.
I don't know of any recommendations for a particular binaural track or waveform parameter set that would have been somehow verified to cause a specific mental response better than other types of tracks.
I'd love to see some blind testing of this brainwave stuff to see whether it's more than placebo.
Doesn't seem too hard to do. Just do a blind comparison of genuine binaural beats carefully crafted to induce a state of concentration or whatever, and random noise or misadjusted binaural beats. It probably requires two people though, the tester and someone other than the tester to create the audio files and give them to the tester without telling them which is which. The tester should preferably be a binaural beats virgin - they should never have heard binau...
We operate like this: the "overseer process" tells the brain, using blunt instruments like chemicals, that we need to find something to eat, somewhere to sleep or someone to mate with. Then the brain follows orders. Unfortunately the orders we receive from the "overseer" are often wrong, even though they were right in the ancestral environment. It seems the easiest way to improve humans isn't to augment their brains - it's to send them better orders, e.g. using drugs. Here's a list of fantasy brain-affecting drugs that I would find useful, even though they don't seem to do anything complicated except affecting "overseer" chemistry:
1) A drug against unrequited love, aka "infatuation" or 'limerence".
2) A drug that makes you become restless and want to exercise.
3) A drug that puts you in the state of random creativity that you normally experience just before falling asleep.
4) A drug that puts you in the optimal PUA "state".
5) A drug that boosts your feeling of curiosity. Must be great for doing math or science.
Anything else?