Mapcraft WorldGen is a world creation tool designed with a production-line approach in mind. It was originally designed to generate worlds for a Traveller campaign, based on the original UWP data but expanding it to include multiple planets per star system.
An example of the latest output can usually be found at http://dev.glendale.org.uk/mortals. This is a view onto a development database, so may change without notice at any time.
A more stable example is http://dev.glendale.org.uk/traveller. However, this is a live data set (it's being used for my current Traveller campaign), so the output is quite old and not up to the new standards.