sign

GNU Privacy Guard (GnuPG or GPG) is a free-software replacement for Symantec's PGP cryptographic software suite.

A secure solution for file and email encryption.

Use your ID-card electronically, digitally sign documents and encrypt documents for safe transfer.

PDF editor for viewing, editing, filling, signing, and converting PDFs

Sign your PDF documents with ease

Free PGP Encryption Software

A tool to sign and verify artifacts

DigiDoc4 is an application for digitally signing and encrypting documents; the software includes functionality to manage Estonian ID-card - change pin codes etc.

Free PDF viewer, signature editor and highlighter that shows documents as a two page book spread.

A fast, lightweight PDF reader with signing, form filling, and highlighting.

Synchronize signatures directly with the user's Outlook on Windows.

Sign your documents digitally

Alipay key tool

Turn any screen into a digital sign in minutes with CloudShow.