http://scw.sheetsofsound.com/editor.html
Haven't tried it myself, but some might find it useful, especially since wave table synthesis is kinda hot these daysAn editor/generator for single cycle waveforms for hardware, software and samplers.
You can use this editor to create waveforms through warping, distortion, wavemixing and waveskewing. Explore the menus to see the editing, rendering and sample formatting options available.