add tools by REVDANCATT (#70)

* add tools by REVDANCATT

* fix lint issue

* Update README.md

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Co-authored-by: Brian Boucheron <brian@boucheron.org>

README.md

@@ -157,6 +157,7 @@ Tools to create vector artwork from scratch or by conversion from other formats.
 - [plotting-maps](https://github.com/piebro/plotting-maps) - A simple web tool to create OpenStreetMap SVG maps for plotting.
 - [ThreadPlotter](https://github.com/LiciaHe/threadPlotter) - "A toolkit for the design and fabrication of delicate punch needle embroidery using X-Y plotters".
 - [PINTR](https://javier.xyz/pintr) - Plottable random line drawings from your images.
+- [REVDANCATT Plotter Tools](https://revdancatt.com/penplotter/) - A bunch of web-based pen plotter tools with SVG output.
 
 ### Vector Utilities