Sketch allows to draw different kinds of sketches for different topics.

For example electric sketches or network sketches, others are possible and configurable by the user. The network symbols are those of mamuen. The electric symbols are not finished yet, just a few of them are included at the moment.

The program is almost finished, but needs testing and fine tuning.

http://www.basic4ppc.com/forum/share-your-creations/3227-sketch-drawing-program.html