Hi, great to see another quiller here!! You can download Inkscape, it is free and can be used as you want to create your letters to quill. Those of us with electronic cutters use it all the time to create our SVG cut files. Inkscape - Download InkScape free graphic editor now
I have been quilling for a few years now and love the new graphic edge quilling and just haven't gotten around to trying it yet!! Let me know if I can help you any. There are a lot of good tutorials for working with Inkscape, some are really techie but others are real simple. I haven't updated my poor neglected blog for a while, I have been doing classes. I am going to do so though, so people don't think I have fallen off the earth!! lol!!