although i've never actually used any of these libraries, the design of twine was influenced by Castle Windsor, Cairngorm 3 and Parsley. those frameworks should be commended for their clear and comprehensive documentation.
twine has a wiki.
you can report bugs via twine's issue tracker on github.
twine is available on github.
twine is available under the new BSD license. Copyright (c) 2011, Cello Software, LLC.