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.
Roundcube Webmail is a browser-based, multilingual IMAP client with an application-like user interface. It provides the full functionality you expect from an email client, including MIME support, address book, and folder manipulation. High extensibility is granted by the plugin API and the user interface is fully skinnable using XHTML and CSS 2.