Nimrod is a web-based internationalizaton tool that allows you to prioritize UI strings in many different ways.
Please refer to http://personales.upv.es/luileito/nimrod/ for documentation, usage examples, etc.
Nimrod is maintained during our spare (and limited) time. Supporting further development does mean that people is really interested in keeping it growing. So please consider donating! Just go to http://personales.upv.es/luileito/nimrod/ and click on the Donate button.