Multi-platform transparent client-side encryption for your cloud files
Next Generation of ShadowsocksX
A dead simple tool to sign files and verify digital signatures
AWS Encryption SDK for C
Modular, high-performance, zero-dependency cryptography stack
Qtum Core Wallet
WinSCP is a free SFTP, SCP, S3, WebDAV, and FTP client for Windows.
FIDO® Certified StrongKey FIDO Server (SKFS)
Free portable cross-platform graphical multi-user password manager
Open source disk encryption with strong security for the Paranoid
For full, incremental, compressed and encrypted backups or archives
Free and open-source PDF signing and verification application.
PGP graphical user interface
cross-platform (Java) file encryption and archiving tool
A cross-platform crypto-steganography toolkit
Midbar is more than just an open source password vault!
Provides encryption & password hashing for your app or Hibernate POJOs
cryptographic contract format
Twinkle is an open-source text editor.