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.
The OpenAI site is centered around an Open Source project and community involving artificial intelligence. The project itself is the creation of a set of tools that are considered to be models of human intelligence or biomimicry. These tools are intended to be integrated into applications or used stand alone for research.
CryptoHeaven offers secure email and online file sharing/storage. Its main features are secure and highly encrypted services such as group collaboration, file sharing, email, online storage, and instant messaging. It integrates multi-user based security into email, instant messaging, and file storage and sharing in one unique package. It provides real time communication for text and data transfers in a multi-user secure environment. The security and usability of CryptoHeaven is well-balanced; even the no-so-technically oriented computer users can enjoy this crypto product with very high level of encryption.
Come And Go Encryption (CAG) is a simple program to encrypt files with a special key. This key is a random garbage file, and it is XOR-ed with the file to render it unusable by normal methods. It uses the principle of the one-time pad, but it is not unbreakable. It can stream the decrypted file to STDOUT for use in pipes (i.e., mplayer movie viewing, xv image viewing, etc.).
GnuPG Made Easy (GPGME) is a library designed to make access to GnuPG easier for applications. It provides a high-level cryptography API for encryption, decryption, signing, signature verification, and key management. It currently uses GnuPG as its backend, but the API is not restricted to this engine. In fact, support for other backends is planned.