django-currencies allows you to define different currencies, and includes template tags/filters to allow easy conversion between them. Branch of https://launchpad.net/django-currencies on github.
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Django Currencies
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Django currencies, is an app that allows you to define multiple
currencies, and gives you the tools to convert from one another. It
requires a functional installation of Django 1.0 or newer, but has
no other dependencies.
For installation instructions, see the file "INSTALL.txt" in this
directory; for instructions on how to use this application, and on
what it provides, see the documentation in the "docs/" directory.