BlogMax makes it easy to use Emacs to maintain a Web log. You define templates and an FTP site for uploads. Most of your site's content is defined by text files. Saving a text file automatically wraps the template around it, expands macros and shortcuts, and saves the HTML file. Other commands in "weblog" mode upload files via FTP, create an RSS file, yank links or blockquotes into the buffer, create shortcuts, etc. The BlogMax Web site was, of course, created with BlogMax. It has been tested in Emacs 20.3.1 on Windows and Emacs 20.4.1 on Mandrake Linux.
CL-INTERPOL is a library for Common Lisp which modifies the reader so that you can have interpolation within strings, similar to Perl or Unix Shell scripts. It also provides various ways to insert arbitrary characters into literal strings even if your editor/IDE doesn't support them.
CL-PPCRE is a portable regular expression library for Common Lisp. It is compatible with Perl, and it's fast, portable (strictly ANSI-compliant), and thread-safe. It comes with convenient features like a SPLIT function, a couple of DO-like loop constructs, and a regex-based APROPOS feature similar to the one found in Emacs. In addition to specifying regular expressions as strings like in Perl, you can also use S-expressions which are more Lisp-y.
Charlemagne is a versatile genetic programming application. It includes a commandline client and an interactive console mode. It is written in Python and Lisp, and is user extensible to some degree in both languages. It features built-in input-output mapping support and provides the ability to define complex fitness calculations in Lisp or Python.