1. The Neo Lucida by Pablo Garcia Assistant Professor of Contemporary Practices at the School of the Art Institute of Chicago and Golan Levin, Associate Professor of Computation Arts at Carnegie Mellon University..
2. Lucid-Art by Ancient Art Tools
3. Camera Lucida Ipad app by Pete Moeykens, a software engineer who happens to love to draw. Recently I started looking into purchasing a camera lucida, partly because I wanted a way to ensure I was drawing objects properly, and partly because they're just so cool.
One of our students first time on the camera lucida.
Three Camera Lucidas
cam·er·a lu·ci·da, kam(ə)rə ˈlo͞osədə/, noun: an instrument in which rays of light are reflected by a prism to produce on a sheet of paper an image, from which a drawing can be made.
A Very interesting interview with David Hockney, where he explains and demonstrates the use of camera obscuras and camera lucidas in the artwork of the Old Masters chronicled in his book Secret Knowledge: Rediscovering the Lost Techniques of the Old Masters.