Is there an ongoing war between technology and tradition? Well, I would definitely go with technology. I have almost tried every diagramming tool there is and a majority of them have helped me in sharpening my creative side and they have definitely helped improve my origami designs.

I personally use Adobe Illustrator for diagramming, but any vector-based art program will work for you. Freehand used to be quite popular but as it's a dead-end software program, it's no longer compatible with many systems. Inkscape is also a decent and free vector art program and certainly good for beginners.