Rsyncrypto allows you to encrypt a file or a directory structure such that they can later be synchronized to another machine using rsync. This means that local changes to the plain text file result in local changes to the cipher text file. rsyncrypto compresses the plain text file prior to encrypting it with gzip using the "rsyncable" patch, which is available from the rsync sources.
The Enhanced File Crypt/eXtended File Stealth System (EFC/XFSS) makes your uploaded files safe on the server so that no one can read them without knowing a few details to decipher the files. It generates different obfuscated names and encrypted files so no one will know what the original format or name was.
Webswell Connect is an e-business integration framework based on the ebXML standard. It allows easy, interactive and user-friendly installation. It consists of an ebXML registry/repository server and client, a messaging system for secure and reliable messaging and user interface similar to popular email clients for sending/handling ebXML messages. It supports HTTP, HTTPS, and email communication while keeping it safe and reliable by implementing digital signatures, encryption, acknowledgment mechanisms, duplication elimination, etc.
OpenXAdES enables people to work with legally-binding digital signatures (primarily giving and verifying them). Legislation often defines a set of requirements that legal digital signature technologies and infrastructures must be compliant with, and OpenXAdES aims at meeting many, if not all, such requirements from different legislations.