Pootle is a Web-based translation and translation
management tool. It provides a rich set of
features for mangaging a translation project. It
integrates components of the Translate Toolkit to
provide error checkers for translation messages
and the ability to download files in a number of
formats: PO, XLIFF, CSV. Pootle can also provide
compiled PO files for download. You can use it to
assign work to translators in your team, and you
can define goals to help focus the efforts of your
translation. Pootle can run without a Web server
or be proxied through your existing Apache server.