A MIL-STD-2525D symbology explorer based on the Joint Military Symbology Markup Language (JMSML) project.
This project is currently going through a major rewrite and the new version has not been published yet.
You can see the old version of the symbology explorer in action at http://explorer.milsymb.net/.
Joint Military Symbology Markup Language (JMSML)
Copyright 2014 Esri. Licensed under the Apache License version 2.0.
Symbology SVG files
Copyright 2014 DISA (SSMC Technical Working Group). Licensed under the Apache License version 2.0.