The VA released their venerable VistA electronic health record system under the Apache license.
OODT is “data middleware” that ties together distributed data sets for processing. It was created by NASA, and is now part of the Apache project.
The Defense Information Systems Agency (DISA) released the Corporate Management Information System (CMIS) under the Open Software License.
The National Security Agency (NSA) created Accumulo, a database based on the BigTable whitepaper. It is now part of the Apache project.
DeveloperView helps web developers collaboratively tag the pages on their website. The FCC released this project under the GPL.
OpenStack is a cloud infrastructure management tool that was co-developed by Rackspace and NASA. It is released under an Apache 2.0 license.