TigerCard was a great software for its time but it is no longer competitive.
Note: it seems that the software hasn't been updated for several years and the version linked to this page is the latest to exist.
TigerCad is a technical application of drawings that is ideal to draw objects design, of drawings or schemata of mechanical device, of electrical or electronic assemblages, of plans of mass of a home, of diagrams in any type.
Once your creation is done, you can export documents in PDF format. You can also use thecopy / glue functions together. It is possible to create and save symbols and use them again later. As any drawing applications, you can rotate and change the size of the image.
This software can be downloaded and used for free.