Better ASN is a Java ASN.1 API that focuses on speed and efficiency rather than extended functionality. This strategy prescribes one-pass decoding and near 100% encoding efficiency for typical ASN.1 usage patterns. Although BASN was developed for use by a Certificate Authority, the release comes packaged with an ASN.1 to Java compiler, which can be used to generate Java implementations of ASN.1 structures. This allows the API to be used for any Java application that may require ASN.1 decoding/manipulation/encoding.
Bork is a very small, cross-platform file encryption utility using a password-based RC4 algorithm. It is designed to be included in source code form along with the files it encrypts for long-term storage (eg on CD-R). Its minimal external dependencies are designed to make it fairly futureproof.
Crackup is a pretty simple, pretty secure remote backup solution for folks who want to keep their data securely backed up but aren’t particularly concerned about bandwidth usage. Backups are compressed and (optionally) encrypted via GPG and can be transferred to the remote location over a variety of protocols, including FTP. Additional storage drivers can easily be written in Ruby.
Dar is a shell command that makes backup of a directory tree and files. Its features include splitting archives over several files, DVD, CD, ZIP, or floppies, compression, full or differential backups, strong encryption, proper saving and restoration of hard links, extended attributes, file forks, Door inodes, and sparse files, remote backup using pipes and external commands (such as ssh), and rearrangement of the "slices" of an existing archive. It can run commands between slices, before and after saving some defined files or directories (for a proper database backup, for example), and quickly retrieve individual files from differential and full backups. Several external GUIs exist as alternatives to its CLI interface, like kdar, DarGUI, SaraB, etc.
Email sends email to remote SMTP servers via the command line, which makes it useful in cron jobs. It will send to any RFC standard remote ESMTP server, is TLS/SSL enabled, and will allow you to encrypt, sign, and design your message on the fly. It has the capability to use signature files with dynamic options, address book functionality, and users can also attach pictures, binary files, documents, or whatever they want. It is completely compatible with GNUPG for encryption and signing, and is easy to configure and use.
FreeOTFE4PDA is an "on-the-fly" (OTFE) transparent disk encryption program. Using this software, you can create one or more "virtual memory cards" on your PDA. Anything written to one of these cards will be automatically and securely encrypted before being stored. A PC version is also available, allowing data encrypted on your PC to be read/written on your PDA, and vice-versa.