Hi!
I just updated my simple online G-code generator, based on HTML5.
SimpleGCoder - Online CNC G-Code Editor
It supports:
2 layers,
3-axis fast jog (G00), linear interpolation (G01), circular interpolation (G02/G03 with R parameter),
F command, drilling, stopping to change tool,
Visualization with different cutting tool size,
Mirror transformation of G-code by X-coord,
Ability to save your G-code on the website and get link to this G-code,
Ability to publish your G-code in Gallery
This is beta version, so i will be glad to receive bug reports.