I don't have much (or any) free-hand drawing talent, but instead have tried to apply my training in technical drafting to heraldry. Vector graphics have the benefit of being able to move elements around or change colors without causing disruption to other parts of the image. They are also infinitely "scalable" and so can be used for things like having a company make a sticker, magnet, mug, or even a full banner. I've even used some of the vectors I've created to have brass seals made for sealing wax. Almost all of the intricate heraldic charges, such as animals, were not hand-drawn by me, but instead are taken from public domain sources.
This is a diagram I made of how the shape of a common "heater" shield is made geometrically. The height "H" of the top part should be 1/3 of the width "W." A compass can then be used to draw the curved sections, using the lower end of the two "H" segments as center points (the left one has a red X in this diagram).
Rendered with a traditional Venetian "escutcheon" (shield outline shape)
A heraldic design described as a joke by an old friend, which I made into a graphic. It's canting arms in a very loose sense.
The following are SVG files of heraldic devices I maintain for others to make use of. They are editable in Inkscape, an open-source vector graphic program. Links lead to files hosted on DropBox.
The official registered device of the branch "Argent, two millrinds in cross within a laurel wreath vert."
Original artist of this file is unknown.
The official badge of the branch. "(Fieldless) Two millrinds in cross vert."
Original artist of this file is unknown.
Roxbury Mill Badge: Stamp/Embroidery Variant
This is a flat, single color version of the millrind symbol without any overlapping portions. Suitable for making stamps or for conversion into an embroidery machine file. I made this based on the original badge file.