There is this "app" for making heraldry. It requires, as far as I can understand, that your computer runs Windows 8.

The app is really easy to use. It do not have many options, but seems good for making heraldry on the fly. Rumor has it that it will get some more content, as time goes by.

http://windows.microsoft.com/en-us/windows/search#q=miralon&s=Store, se "Heraldry"!