Bitgen 0.13 has been released:

http://bitgen.org/

This release has moved parts of the codebase into the library bitlib:
http://bitgen.org/bitlib

The bitlib library currently includes functionality for address and private key handling,
more functionality will be included in later releases.

Also, the big integer implementation used by bitlib is released as a separate library
that provides support for fixed length signed big integers:

http://bigintctl.org/

This release also includes support for storing private key and address information
in a folder structure to make it easier to manage multiple addresses.
The command line argument "folder" should be added to use this feature, for example:

$ bitgen random folder

Windows binaries are now provided for direct download.
However, it is recommended that binaries are built from source instead
of using the existing exe-files.

On Linux it is very easy to build windows binaries.