I noticed the other day that my Literate Programming system was not Python 3 compatible. As this is generally unacceptable to me, I updated Spiralweb for the first time in a few years. There really aren't any changes besides the port.
PyPI entry: https://pypi.python.org/pypi/spiralweb
Github: https://github.com/michaeljmcd/spiralweb/releases/tag/v0.3