Ive used the excelent work of z80 (http://fwcg.3dzone.dk/) in the past, but the limitations of one single panel and no forward sweep made me look for multi-panel CG calcs, and Ive found only very old windows programs. Accustomed to the online and direct use of z80's tool, Ive decided to make my own online CG calculator, with forward sweep and multiple panels.
WingCGCalc is a flying wing CG calculator flexible enough to calculate complex wings, with multiple panels and forward swept. As the percentual position of the MAC for the CG is also configurable, you can use it with standard airplanes (with tail) too, It's only a question of configuring the right amount.