WinSCP is a free SFTP, SCP, S3, WebDAV, and FTP client for Windows.
For full, incremental, compressed and encrypted backups or archives
Implementation of ENTSOG AS4, e-SENS AS4, ebMS AS4, PEPPOL AS4
Powerful webdav client and sync tools with client-side AES encryption
CMP [RFC4210] implementation based on OpenSSL
Binary Conversion Calculator
NetCrypt - file-transfer utility providing secure data transfer
Java code for signing and handling Croatian fiscal service requests