Here is a card I designed in Inkscape. When you select the polygon/star tool, you can make all kinds of fantastic designs by manipulating the nodes and the settings. I had a lot of fun while designing this card. My inspiration was cuttingtimes youtube video called: The Star Shape and Stroke Used to Create Designs. She has awesome videos and has a very cool blog. The address is: www.cuttingtime.blogspot.com She has some excellent tutorials for Inkscape.
Here is my youtube video: