I've been looking for something like this ever since I started on computers ... but alas nothing really usefull ever crossed my path. I did use some sort of simple CasCADe in the late nineties but have since lost the program and "Open Cascade" today is far too difficult for my purpose. I was quite thrilled therefore when I found Cademia on www.cademia.org .
It is an Open Source application written in Java and as such "portable" in the platform sense as well. It can be started with a provided *.exe file and seems to run on my usb-stick in the same way as it performs on the hard drive. It can read dxf in the current version and dxf export as well as jpg import is planned for the next version (1.5).
I have found these older entries for Java support:
and therefore would be happy if anybody could write a wrapper with a version that includes setting up a portable version of java or links the app to an existing one.
Many thanks for the portable apps so far and I have been quite busy setting up usb-sticks for the work at office and for friends - its just fun and looks so neat.
thanks in advance