node-po

Used to load and save PO files.

var po = require('po')  
  , fs = require('fs')

po.load('text.po', function(_po){
  console.log(_po.headers);
  console.log(_po.items);
  
  _po.save('copy.po', function(){
    console.log('We copied a PO file for no reason!');
  });
});