Implementation of the EDIINT AS2 protocol (RFC 4130)
Implementation of the OFTP2 protocol (RFC 5024)
AS2 1.1 server implementation in Java
CrococryptQuerl is a web-based file encryption & transfer tool
A simple native java network library
Encrypting, anonymous, unlimited size message transfer system
ImpraStorage provided a private imap access to store large files
A P2P Messenger which uses JXTA. It provides secure RSA/AES end-to-end