SQLite is a small, fast, embeddable SQL database engine that supports most of SQL92, including transactions with atomic commit and rollback, subqueries, compound queries, triggers, and views. A complete database is stored in a single cross-platform disk file. The native C/C++ API is simple and easy to use. Bindings for other languages are also available.
Surfraw (Shell Users' Revolutionary Front Rage Against the Web) provides a Unix command line interface to a variety of popular Web search engines and sites, including Google, Altavista, Wikipedia, Babelfish, Ebay, Wayback, Research Index, Yahoo!, Slashdot, freshmeat, CPAN, dictionaries, weather, currency conversion, and many others.
Sysmon is a network monitoring tool designed to provide high performance and accurate network monitoring. Currently supported tests include monitoring of SMTP, IMAP, HTTP, TCP, UDP, Radius, NNTP, and POP3 servers. It also includes the ability to ping hosts and routers, as well as the ability to perform SNMP queries and generate alerts based on those results. Sysmon has the ability to understand real network topologies, including the ability to monitor multiple paths and only report the actual device that is down instead of a router that is down, and all the hosts behind it.
TEA Total is a collection of extremely small encryption tools. At the heart of TEA Total is the TEA (Tiny Encryption Algorithm): a fast and secure 128-bit private key algorithm which was developed and placed in the public domain by David Wheeler and Roger Needham of the Cambridge Computer Laboratory.
Tetrinet for Linux is a Linux version of the popular Windows multiplayer Tetris game. It should work on all systems having the ncurses library installed. This version runs in textmode only and requires a 50-line display. Both Tetrinet server and client functionality have been implemented.
tkbiff allows arbitrary commands to be executed upon mail reception. If you like programs such as xbiff and xbiff++ but wish they were more flexible, then you'll like tkbiff. Unlike other biffs, tkbiff is fully customizable. tkbiff also doesn't waste your valuable screen space with icons; instead, it shows you the mail itself. It supports UNIX, Mac, and Windows, IMAP, POP, and UNIX-style mail files, and SSL and APOP.
txtbdf2ps is a small, self-contained Perl script that converts ASCII text files into Postscript using a given bitmap (BDF) font. (The character bitmaps are embedded into the PS file as a Type 3 font.) The script can be used to print texts in international character sets or for proofreading BDF fonts. Features include justified paragraphs, adjustable margins, and a slim & simple resulting PS.