These threads share some of that information:

Collection of 18.509 found and used Brainwallets

Bitcoin puzzle transaction ~32 BTC prize to who solves it

As well as finding SHA256 brainwallets I have also discovered 5000+ miscellaneous private keys. Some of them are deliberately weak (eg private key 0x1 compressed / uncompressed) but many of them look just like a properly generated random key. I can't release them because some of those keys belong to my own wallets. (Before anyone asks, NO, they do not have funds, and NO, apart from the really weak ones they were not brute force cracked. That doesn't work!)