Is there open source software for SEM EDX data analysis? This can't be unique to me and would apply to anybody who has to use equipment in other departments has had departments move etc.

What open source packages exist to read and potentially manipulate SEM EDX (electron dispersive x-ray elemental analysis) data after the data has been collected?

(In my case I have data from an Oxford Instruments EDX but there are many more manufacturers.)
You could use HyperSpy library for Python. 

Some examples of what you can do with it are available here.