There's a number of so-called "3D Printing Pens" on the market now, or coming soon, though in reality I think they should be called "3D Drawing Pens". I mean, you don't have a "2D Printing Pen" do you? Pens are for drawing, they are not printers that print. I know a lot of people are []
Raster3D—Wolfram Language Documentation
Addgene: pENTR-D-TOPO-PAmCherry1_160-236-MCS
ANIUHL 20 Sheets 3D Printer Drawing Molds Paper Stencils for 3D Printing Pen, 40 Patterns and A Clear Plate Set
Raster3D—Wolfram Language Documentation
Get creative and make fabulous art projects come to life with the amazing PenPic 3D paint drawing pen!, Made from ABS plastic., A range of colors
PenPic - 3D Paint Drawing Pen
Multimodal Cross-Device and Marker-Free Co-Registration of
stylus – RasterWeb!
Pano3D: A Holistic Benchmark and a Solid Baseline for 360o
Uni Pin Fineliner Drawing Pen - Sketching Set - Black Ink - 0.03 to 0.8mm - Set of 6 : Office Products
Uni Pin Fineliner Drawing Pen - Sketching Set - Black Ink - 0.03 to 0.8mm - Set of 6
Pano3D: A Holistic Benchmark and a Solid Baseline for 360o
Raster3D—Wolfram Language Documentation
3D “Drawing” Pens – RasterWeb!