Visually tune your HF antenna using an oscilloscope and signal generator
Thanks to hackaday: http://hackaday.com/2013/09/20/visually-tune-your-hf-antenna-using-an-oscilloscope-and-signal-generator/
Cobweb Antenna
http://www.karinya.net/g3txq/cobweb/
Fractal Antenna Systems
For those that are interested in different antenna designs, check out Fractal Antennas.
http://classes.yale.edu/fractals/Panorama/ManuFractals/FractalAntennas/FractalAntennas.html