mailq_applet is a GNOME 1 panel applet that shows the status of your outgoing mail queue. It's intended for dialup users who may connect, wait for the queue to drain, then disconnect. Having this on your panel is much more convenient than running mailq over and over again from a terminal. It works with Exim and Sendmail. If you use a different MTA, you may need to make some changes, but the code is so trivial that that shouldn't be difficult. This code is no longer used or maintained by its author.
Decimail Server is a mail server supporting IMAP and SMTP that uses a PostgreSQL database to store messages. Mailboxes are defined using SQL queries, allowing complex client-independent automatic message filtering and categorisation. For example you can partition your messages chronologically, by correspondent, and by mailing list at the same time, with each message appearing in several mailboxes. You can also use PostgreSQL's text indexing extension for fast keyword searching. Decimail also features anti-spam processing of outgoing messages.
CADmenu makes ctrl-alt-delete more user-friendly on Linux systems. It displays a menu of actions from which you can choose to shutdown or reboot the machine, enter single user mode, or cancel and return to whatever you were doing. It's straightforward to add your own options to the menu, and it works consistently from text consoles and X.
Restless is yet-another lightweight markup processor; it generates HTML from plain text with non-intrusive markup of headings, bullet lists, and so on. But unlike other such tools, restless aims to do less: it does not use cryptic punctuation to control advanced formatting, and instead uses heuristics to classify, for example, code samples versus text. It can be used from the command line or on-demand as an Apache filter.
Not a great advert for Freshmeat!
> I'm sure there are plenty of excellent XML modules for Perl, but I
> didn't want to go through the pain of having to find one and
> install it
What an odd article to post on Freshmeat! This is a site which is designed to make it easy to find software that does what you need, so that you don't have to roll your own inevitably-inferior solution. But you're saying that, despite sites like Freshmeat and CPAN, it would be a "pain" to find a Perl XML parser - so much so that you've written your own.
Hmm. Freshmeat admins, take note. You might like to interview this guy and find out what it is about your site that he finds so difficult to use.