Sympa is a scalable and highly customizable mailing list software. It can cope with big lists (780,000 subscribers), and it comes with a complete Web interface for both the user and the administrator. It is internationalized. Sites can customize Web and mail templates, authentication backends, and authorization scenarios. Dynamic mailing lists can use multiple backends (LDAP, SQL, files, lists, or others). Sympa is the only S/MIME and DKIM enabled mailing list software, and it provides both authentication and encryption.
tcpflow is a program that captures data transmitted as part of TCP connections (flows), and stores the data in a way that is convenient for protocol analysis or debugging. tcpflow understands TCP sequence numbers and will correctly reconstruct data streams regardless of retransmissions or out-of-order delivery. Each stream is stored in a separate file for later analysis. tcpflow is designed to be portable, using the LBL packet capture library and GNU autoconf. It works under most UNIX platforms and for most common network interface types (ethernet, PPP, loopback, etc.).
GIMP is the GNU Image Manipulation Program. It is a freely distributed piece of software suitable for such tasks as photo retouching, image composition and image authoring. It can be used as a simple paint program, an expert quality photo retouching program, an online batch processing system, a mass production image renderer, a image format converter, etc.
MiscTools is a collection of small UNIX utilities that are fairly trivial but nevertheless useful. These include a binary dump program, a directory browser/selector, a file truncator, an ASCII-code lookup utility, a program for printing fortunes, a curses-based terminal lock program, and a few others.
TinyFugue is a programmable client for text MUDs. It is primarily for Unix-like platforms (including Mac OS X), but also works on Windows. Features include: a text terminal UI with separate panes for user input and server output; connections to multiple MUD servers, displaying each in a virtual window; a powerful scripting language; Perl-compatible regular expressions; user-defined triggers and hooks to allow scripts to be executed automatically based on text from server or other events; user-defined highlighting/coloring and gagging (filtering) of server text; user-defined key bindings; a history of server output and user input; locale support; a library of useful scripts; IPv4 and IPv6; SSL; EOR and GOAHEAD prompt protocol; MCCP (MUD client compression protocol); and ANSI display codes (e.g. color).
Tinyproxy is a light-weight HTTP/HTTPS proxy daemon for POSIX operating systems. Designed from the ground up to be fast and yet small, it is an ideal solution for use cases such as embedded deployments where a full featured HTTP proxy is required, but the system resources for a larger proxy are unavailable.
TkCVS is a cross-platform, Tcl/Tk-based GUI for the CVS and Subversion configuration management systems. It displays the status of the files in the current working directory, and provides buttons and menus to execute CVS, Subversion, or RCS commands on the selected files. The Log Browser displays a branch diagram of the revision history. The Module Browser extends CVS with facilities for a user-friendly listing of modules in the repository. TkDiff is included for browsing and merging your changes.
Unix Amiga Delitracker Emulator (UADE) plays most Amiga music file formats by simulating Amiga hardware and software. It plays approximately 200 Amiga music file formats. It provides a command line tool for playing, but it also provides music player plugins for XMMS and Audacious. For other music players, there is a FUSE filesystem that transparently converts Amiga songs to WAV files.