ISP software:

• rpsltool is a BGP filters generator based on Template::Toolkit.
• cisco-tools: arpwatcher, checkdualif, cisco-cmd, dumppeers, routesdiff, update-list, drop. A collection of random programs which may or may not be useful to people managing Cisco routers.

Usenet-related software:

• autoresponder.tgz is a new autoresponder for test groups, with replies rate limiting.
• moderatore is a very old snapshot of my perl robomoderator based on News::Gateway.
• cmsg-tools is a collection of scripts I use to generate control messages for the it.* and linux.* hierarchies.
• News::ICC is a perl implementation of the inndcom.c library (the same used by ctlinnd).
• News::Nocem is a perl module useful for generating nocem notices.
• NewsDist shows how your feeds are connected (buggy).
• inndelay.pl displays a graph of articles propagation time (original version by Fabien Tassin).
• gpgverify is like pgpverify but uses GnuPG (not much useful now that pgpverify uses GnuPG too).
• inews.c is a light and simple inews implementation.

Jabber-related software:

• headlines4.pl is a jabber component which distributes RSS headlines.
• presence provides web presence icons.

Some irssi scripts I wrote or modified.

Other software:

• whois is an improved whois client. It is part of Debian, Mandriva, SuSE, PLD and other Linux distributions.
• zebra-dump-parser is a parser for the binary packet dump format of zebra and MRT. It can be used to parse BGP dumps from RIPE RIS or routeviews.
• switchsh is a tiny program which can be used to temporarily change /bin/sh only for its child processes. It shows how to use bind mounts, CLONE_NEWNS and the clone(2) and unshare(2) Linux system calls.
• multicast-tools is a collection of simple programs which can be used to test multicast connectivity.
• bindgraph is a tool that makes pretty graphs about queries sent to your BIND name server. (bindgraph 0.1 supports BIND < 9.3.)
• setlimits.c is a trivial helper program which raises some system limits and then drops privileges before spawning another program. It's used on servers of the freenode IRC network.
• spam-stats.pl is a postfix log analyzer.
• 6to4 is a simple script to enable instant IPv6 connectivity on Linux.
• I refactored the old lbnamed perl load balancing name server in what later became Stanford::DNSserver.

Hacks of dubious utility:

trenitalia2csv: converte in CSV l'elenco dei biglietti ferroviari acquistati con Cartaviaggio.

Useless and/or obsolete software:

• vacation is an improved vacation program.
• tinyrmail.c is a small rmail implementation intended for use with postfix or other domainized MTAs. It does add a Received header to help identification of the remote UUCP system.
• start-stop-daemon with capabilities support.
• MdMDA is a minimalist mail delivery agent for big sites. It supports virtual users, maildirs, quotas and hashed spool directories. Think of it as a programming exercise.
• formail.diff is a small patch to formmail.pl which you can use to create a spam honeypot.
• readdir-wrapper.tgz is a library which can be used to make long find(1) runs less heavy on busy systems.
• lockvt.c is a console locker for Linux systems.