Web Helpers
Web Helpers is a library of helper functions intended to make writing web applications easier. It's the standard function library for Pylons and TurboGears 2, but can be used with any web framework. It also contains a large number of functions not specific to the web, including text processing, number formatting, date calculations, container objects, etc.
Version 1.3 fixes a performance regression in 1.2 regarding paginate with SQLAlchemy.
WebHelpers itself depends only on MarkupSafe, but certain helpers depend on third-party packages as described in the docs.
The development version of WebHelpers is at http://bitbucket.org/bbangert/webhelpers (Mercurial)