Pipe helps you write, test, and debug shell scripts quickly while using your favorite text editor. You can filter text through your scripts and see the script source, input, and output simultaneously. Pipe also provides a system-wide service so you can feed text from any application through your scripts.
Snowlist generates an RDF (RSS 1.0) document from individual email messages or from a mailing list. Rather than producing one news item for each mail message, it will group topics into a single RSS item and present the list in a bulletin board like view. It depends on a number of Perl modules and requires an SQL database.