Everything from Todd Ditchendorf is so unique and thoughtful. His groundbreaking app Fluid is known by every longtime Mac user. Todd continues to impress with his new apps too. Schwartz is a vector graphics app that automatically generates templated code in a variety of languages. As with everything under the Celestial Teapot umbrella, Schwartz is also inexpensive at only $10.
Here's a great intro to using Schwartz to create SVG graphics for Safari pinned tabs.
Schwartz|Mac App Store|$10