Currently in development, CncSim is a project of simulator with realistic output. It will be available in several release :
Light Mill
Light Turn
standard g-code 3D milling flat mill bull mill screen shot
standard g-code turning
Light Hot Wire
Professional
standard g-code 4 axes hot wire
custom g-code via scripting (Python...) custom tools material tool crash removing unused material 3D milling 4D milling turning laser plasma electro-wire hot wire
Expert
CNC modelling et movement support collision machine collision
GGCom
GGCom is a program used to send and receive files through the serial port. The supported protocols are XModem and XModem1K. It has as well the possibility to be called with the command line, and so, you can integrate it within another application. It will replace in an efficient way HyperTerminal. It supports Windows XP, Vista et Windows 7.
Image Importer
Image Importer is a software which generates cnc file from a gray image. Each level of grey will be the deep pass height. The software is published under GPL licence, as well as the source code.