Deform comes with default Chameleon templates for Bootstrap based widgets. It uses Colander as for form schema and validation definitions. Deform integrates well with Pyramid web framework and several other web frameworks. Peppercorn library is used to convert flat HTML name value mapping form submissions to stream of name value mappings submissions, allowing building complex and nested form structure.
Please see http://docs.pylonsproject.org/projects/deform/en/latest/ for the documentation.
See https://github.com/Pylons/deform for in-development version.
This library is actively developed and maintained.
To get in touch with the community join to Pyramid IRC channel or Pylons mailing list .