NetCrypt - file-transfer utility providing secure data transfer
...In it's default configuration, it uses the AES-256-GCM cipher with a PBKDF2 key iteration count of 32000 rounds.
NetCrypt is an secure alternative to netcat, but might also supplement SFTP or SSH for file-transfer.
NullFXP is a cross-platform SFTP/FTP/Secure FTP client with GUI, based on Qt technology. It support multi host connection and multi transport each other supported protocol at meanwhile.
Map local drive to remote Windows network share (or Samba server) on the Internet. Connection is secured by using an encrypted SSH connection as transportation.
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File system over a standard SQL open source database, here PostgreSQL. It provides standard methods to establish a link between a disk based file system and implements all what is known on a standard ext2 file system.
Interesting for all web developments
p2p-fs is a Peer to Peer file system in user space, using FUSE. Allows you to share files over an LAN and/or WAN. Can be mounted as a normal file system under Linux.