For these kinds of data, KLISS provides a thick client application created on top of the NetBeans Platform, with embedded OpenOffice, UNO API integration, as well as Jython interaction. Identity management and role based access control are also included.
Here's a screenshot I found, which clearly has the NetBeans Platform beneath it:
Very interesting webinar (free): Transforming Government Through E-Democracy
A great blog to read around this topic is http://seanmcgrath.blogspot.com, by Propylon Chief Technology Officer Sean McGrath, which is where the quotations and info above come from.
Propylon has recently applied to be an Oracle partner and they're interested in investigating where work can be done together. This is all very interesting and I'm hoping that soon an article/interview by the people behind this project will be made available.