Docker image hoveytech/visio-stencil-creator prebuild using this source. Replace <content-path> with host path that contains images to be processed and where generated Visio stencil should be written ...
Thingiverse Varies Huge collection of models and designs. Mostly 3D printing but lots of laser cutting stuff, too Free Picture Stencil Maker Free Turns images into stencils. Rest of site is a for-pay ...