A few months back I wrote some Python 3 scripts to generate Bitcoin addresses. They work just like Brainwallet does, and in fact are 100% comaptible with brainwallet -- you can copy the private key into brainwallet and expect everything to work.

I use these personally instead of brainwallet so that I don't even need to open a browser in order to generate some addresses. It now occurs to me that perhaps some of you would find a use for them, too.

I have two versions: the first one uses the OpenSSL's random number generator to generate addresses. That means it's unlikely to ever generate the same address twice. The second version hooks into the RNG and always returns the same bytes given a specified seed. That means it behaves similar to "Passphrase" option. It'll generate the same address given the same seed.

Version 1

Version 2

Simple Base58 implementation

If someone can speak on the randomness of version 2, that'd be great.

Also, I haven't tested these on Windows.

If there's any interest in having a script that builds transactions, let me know.