WiseStamp - WiseStamp allows you to easily create and implement slick and unique email signatures for your business.
IronPDF - SDK for creating and editing PDFs.
NEWOLDSTAMP - Email signature generator
PDF to X - PDF to X is used to convert PDF documents to Word (.doc)/WordPad (.rtf) documents, HTML web pages, JPG/PNG/BMP/TIF/GIF/PCX/TGA images and plain text files in batch mode. It works without Adobe Acrobat or Adobe Reader.
Sigstr - Email signature marketing
Apache PDFBox - The Apache PDFBox™ library is an open source Java tool for working with PDF documents.