Free, open-source desktop app for legally binding PDF digital signatures. Sign with PKCS#11 hardware tokens, USB dongles, smart cards, PFX certificates, or Windows keystore. Adobe-compatible, RFC 3161 timestamped, fully offline — no cloud, no subscription.
Foxit PDF Readerand
Evince
An all-in-one free online PDF editor that does not require subscriptions or installations! DeftPDF is a free online tool that makes editing and converting PDF easy in just a few clicks!.
Stirling-PDF
Free Cisdem PDFSigner for Mac lets you sign PDF securely and legally. Even without printer and scanner, you can directly sign PDF with mouse or trackpad or directly add scanned signature in image.
LibreOffice - Writer
Fill makes it super easy to complete your PDF form. It is built to work like Google Docs for PDFs. Sign documents yourself, or send them to one or more other people to sign. Download your completed forms as PDFs, or email them directly to colleagues.
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