When I need to draw something in draft (algorithm, logotype and so on), I use pencil and ruled paper, but I own Wacom tablet and I'd like to have ruled paper on the screen too, so I have created iGrid - applications that plots rules right over desktop. Now I don't need any plugins for different graphic editors, but I can have any type of orthogonal, axonometric and handwriting grids.
Color, transparency and grid settings are fully customizable.
More details: http://greatis.com/utilities/igrid/
If you need iGrid functionality for your own application, you can order iPlotter - library with full course codes for .Net (C#) and Delphi: http://greatis.com/utilities/plotter/

