Text::Template is a module for doing dynamic content generation in Perl. You can embed any Perl code into a file, and then make a call to the module to `fill in' the blanks in the file. This is good for generating HTML pages and form letters. It was first released in 1995 and is very stable, very fast, and very reliable. It is also integrated with Perl's Safe module in case you don't trust the template author.
Thatware is a Slash lookalike. It is a Web-based news publishing and discussion backend written in PHP that can handle threaded discussions with a minimum of configuration and day-to-day management. It includes Web-based administration, polls, access statistics, user customizable boxes, a themes manager for registered users, the ability to edit or delete stories, a moderation system, search engine, backend/headlines generation (WAP and RSS/RDF format), and support for 7 languages.
osCommerce is an open source e-commerce solution under on going development by the open source community. Its feature packed out-of-the- box installation allows store owners to setup, run, and maintain their online stores with minimum effort and with no costs involved. osCommerce combines open source solutions to provide a free and open development platform, which includes the powerful PHP web scripting language, the stable Apache web server, and the fast MySQL database server.
The Kawa Scheme System is a full Scheme implementation, completely written in Java. Scheme functions and files are automatically compiled into Java byte-codes. Kawa does some optimizations, and the compiled code runs at a reasonable speed. It provides the usual read-eval-print loop, as well as batch modes. The Kawa compilation framework is also useful for implementing other languages on top of JVM. There is active development of XQuery (the XML query language), and less active development of Emacs Lisp, Common Lisp, and EcmaScript.
TiK is a pure TCL/Tk implementation of AOL Instant Messenger (AIM). It has most of the features the native Win32 and Mac clients have, plus some extras. It includes a graphical buddy list display, full font support, graphical emoticons, away messages, buddy pounce, buddy ticker, IM/Chat capturing, message broadcasting, a GUI preferences system, and much more. TiK's expandable nature allows the addition of new features through packages.