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.
GPassguard is a GTK+ frontend to the *PassGuard suite, which manages passwords in an encrypted file so that you only have to remember one. It uses the PassGuard Framework and can be interfaced with any kind of encryption via a plugin system. It allows you to copy passwords to the clipboard.
Gpasman is a password manager. People working with the internet have to remember lots of passwords. Saving them in a textfile is not a secure idea. Gpasman is a GTK solution to this problem since it saves the password information encrypted, so now you have to remember only one password instead of ten (or more).
Hardened Debian improves Debian GNU/Linux with high security and hardening features, hardened kernels and packages, DHKP, and other security related enhancements. It makes systems more difficult to compromise using common attacks such as race conditions, chroot jail escapes, and buffer overflows.
J2SSH is an object-orientated Java implementation of the SSH version 2 protocol. It provides a rich, powerful, and extensible SSH API that enables developers to gain access to SSH servers and to develop entire SSH client/server frameworks. The API library provides a fully-featured SSH2 implementation specifically designed for cross-platform development. Higher level components, representing both the standard SSH client and SSH servers, are provided which implement the protocol specification for user sessions and port forwarding. The specification currently supports public key and password authentication and a full implementation of the SFTP protocol.
Maverick is a professional-level Java SSH API that is based upon the popular open source J2SSH library. It features support for both SSH1 and SSH2 protocols and compilation under JDK versions 1.1+, including the latest J2ME Java Mobile Platform. It also provides a range of performance enhancements with no dependencies, a single-threaded architecture, and improved file transfer rates.
John the Ripper is a fast password cracker, currently available for many flavors of Unix, Windows, DOS, BeOS, and OpenVMS. Its primary purpose is to detect weak Unix passwords. It supports several crypt(3) password hash types commonly found on Unix systems, as well as Windows LM hashes. On top of this, lots of other hashes and ciphers are added in the community-enhanced version (-jumbo), and some are added in John the Ripper Pro.
Lepton's Crack is a generic password cracker. It is easily-customizable with a simple plugin system and allows system administrators to review the quality of the passwords being used on their systems. It can perform a dictionary-based (wordlist) attack as well as a brute force (incremental) password scan, including the use of regular expressions. It supports standard MD4 hash, standard MD5 hash, NT MD4/Unicode, Lotus Domino HTTP password (R4), and SHA-1 hash formats. LM (LAN Manager) plus appending and prepending of characters is available in the Development branch (strongly recommended).