The GlideinWMS development been sponsored by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics, and by the CMS collaboration.
The initial version of GlideinWMS (v1.0) was heavily based on the CDF glidekeeper code:
http://indico.cern.ch/contributionDisplay.py?contribId=147&sessionId=8&confId=048.
The development of that code was jointly funded by INFN, Fermilab and UCSD.
GlideinWMS heavily relies on HTCondor:
http://www.cs.wisc.edu/condor/.
The support of the Condor team was invaluable in the realization of GlideinWMS.