I am looking to find out how to convert any letter or image to look like a cut stencil for marketing purposes. Answered

Draw a background.

Make a new layer with transparency. Draw your paper. Add the text in black.

Mark the black text with the "Select by colour" tool (Gimp has a tool with that name). Press delete. Now the letters became transparent (holes in the paper).

Rotate the paper layer. Make a copy of the paper layer. Turn the paper black. Use the curves tool for that (Colour->curves). Place the black copy underneath the paper layer. Move them a bit from each other. Now the black layer looks a bit like a shadow.

Add some blur to the shadow.

There are many stencil fonts available for free

https://www.google.co.uk/search?q=stencil+fonts+fr...

Other than that you can take any font, Fill with white or transparent depending on your software capability and add the links to prevent the cut out area falling out - example below I produce in my CAD program - Click on image to view full size.

Yes I know about an Android app who's name is 'pixelLab' .you can find it on Google play store.