CutePDF is a proprietary Portable Document Format converter and editor for Microsoft Windows developed by Acro Software.   CutePDF Writer can create PDF files,  and CutePDF Form Filler can edit simple PDF forms so that they can be sent without using more expensive PDF authoring software. 
Despite a name that makes me mumble "Goochie, goochie, goo...," CutePDF Writer is hardly a infantile application. Actually, it's not an application at all in the normal sense. You don't invoke it directly; It installs as a printer driver, interfacing with one of the free postscript to PDF drivers (PS2PDF) that are available to enable you to create PDF files without buying Adobe Acrobat.