AFT (Almost Free Text) is a document preparation system. It is mostly free form, meaning that there is little intrusive markup; AFT source documents look a lot like plain old ASCII text. It has a few rules for structuring your document, more to do with formatting your text than embedding lots of commands, and it produces all types of output (HTML, XHTML, LaTeX, roll-your-own XML, etc.). All that needs to be done is to edit a rule file. You can even customize your own rule files for specialized output.
AI::Prolog is a predicate logic engine implemented in pure Perl. In predicate logic, instead of telling the computer how to do something, you tell the computer what something is and let it figure out how to do it. Conceptually, this is similar to regular expressions. The AI::Prolog distribution contains a Prolog shell called aiprolog and two short adventure games, spider.pro and sleepy.pro.
APLM (Alex Personal Library Manager) is a set of Perl scripts for managing a small library. It is designed to be easy to set up, easy to use, very customizable, and self-contained. It lets you type in your books, change a few paths, and get going without worrying about MySQL or anything. It also has a Web interface.
ASCIIweb is a text-to-HTML formatting system that uses the 'pre' tag to create ASCII art Web pages, either on the fly or for static retrieval. It has a simple and flexible module system that also allows you to integrate shell scripts and practically any text output into your Web pages. It will also parse and include live Apache-style directory listings into your pages, giving you a creative and sharp looking way to make files available to your users. It looks just as good in Lynx as it does in Firefox.
AWbot is a bot that connects to your Web site and makes URL requests like human visitor. It's not a Web indexing robot, but a Web client tool that emulates visitors browsing your Web site to test its stability after a development change, its reliability, and its response to heavy loads.