• anonftpd: a secure, read-only anonymous FTP server
• cdb: a package for creating and reading constant databases
• checkpassword: a simple password-checking interface
• clockspeed: a tool to adjust the speed of the system clock
• daemontools: supervise, svc, cyclog, accustamp, tailocal, setuser
• ezmlm: an easy-to-use, high-speed mailing list manager
• ftpparse: a library for parsing FTP LIST responses
• libtai: a library for storing and manipulating dates and times
• primegen: a library for generating prime numbers (in order)
• qmail: a replacement for sendmail
• qmailanalog: tools to analyze qmail's activity record.It supplies statistics to answer a wide variety of questions:
• overall: how many messages? recipients? attempts? etc.
• ddist: how soon were 50% of the messages delivered? 90%? 95%? 99%?
• rxdelay: what's the best order of recipients for mailing lists?
• recipients, rhosts: who's getting mail? bytes? messages? attempts?
• successes, failures, deferrals: why? how often? how much delay?
• senders, suids: messages? bytes? load? recipients? attempts? delay?

• qmsmac: a sendmail/smail aliases clone for qmail
• serialmail: tools for passing mail across serial links
• tcpcontrol: a very fast TCP access controller
• ucspi-tcp: TCP client-server command-line tools

• Dan Bernstein's ezmlm, a mailing list manager specifically for qmail. Jacques Deguest HTMLized the ezmlm Man pages.
• Russell Nelson has a system for allowing SMTP access only to users who have valid POP3 access. This is for sites that need to allow relaying for customers, but who don't know where their customers are coming in from.
• Harald Hanche-Olsen has written a wrapper for qmail, which lets you easily start, stop and restart it.
• David Summers has a qmail-imap Linux RPMS plus just the patches if you want to patch the University of Washington IMAP server with just the one-line patch to get it to work with $HOME/Mailbox.
• Chael Hall has some utility programs for qmail. One, logger2, responds to a kill-HUP by reopening the file named on its command line for output. The second, restart.pl, is a perl script which will restart qmail after you have changed a control file.
• Chael Hall's majordomo+qmail patches. Making qmail and Majordomo 1.94 (or later) coexist peacefully.
• Giles Lean didn't like the idea of patching majordomo, so following a suggestion from J.T. Conklin that he found in the list archives he wrote a majordomo-inject script and some documentation on how to use it. Needs Perl 5.004.
• Olaf Titz's BSMTP package for qmail, for those who want to run BSMTP over UUCP with qmail. The 10k shar contains an rsmtp program for incoming messages and a maildir2bsmtp program for outgoing messages. Both are written in perl.
• Russell Nelson's checkhomeownership script will report on users who don't own their home directories or Maildirs. This is important to run before starting up qmail, because sendmail doesn't care a whit whether the user owns their home directory, but home directory ownership is how qmail decides if the user exists or not.
• David Summers has some perl scripts that work with maildir2smtp. Now uses APOP-style authentication.
• Russell Nelson's newbox script to create new maildrops for users who don't have login accounts on their mail server.
• John Palkovic's qlistbuild.pl program, which creates a mailing list out of a list of email addresses.
• Russell Nelson has a bounce manager which totally eliminates any need to deal with bounces.
• Chris Garrigues wrote a program to pretty-print Received: lines.
• Brian T. Wightman has written a delayed-mail notifier.
• Mark Delany has a rmail for people receiving ! addresses via UUCP. It parses ! addresses, applies a number of simple pattern matching rules to convert them to FQDN addresses and injects them into qmail.

A user, track2, wants to set-up a mailing list called track2-participants
on the host  host.TLD.

track2 types just one command:

"ezmlm-make   ~/Participants   ~/.qmail-participants  \ track2-participants   host.TLD''

(all in one line) and instantly has a functioning mailing list,

with all relevant information stored in a new ~/Participants directory.

track2-participants-subscribe and track2-participants-unsubscribe for automatic processing of subscription and unsubscription requests.
Any message to track2-participants-subscribe will work; track2 doesn't have to explain any tricky command formats to the subscribers.

ezmlm will send back instructions if a subscriber sends a message to track2-participants-request or track2-participants-help.

An ezmlm directory, dir (Participants in the example), stores information about an ezmlm mailing  list.   ezmlm-make  creates  dir;  ezmlm-sub  and ezmlm-unsub  manipulate  the  subscriber list stored under dir; ezmlm-manage handles administrative requests automatically;  ezmlm-send  sends  a  message  to all subscribers listed in dir.

• automatically archives new messages. Messages are labelled with sequence numbers; a subscriber can fetch message 123 by sending mail to track2-participants-get.123.
• reliably determines the recipient address and message number

for every incoming bounce message. It waits ten days and then sends the subscriber a list of message numbers that bounced. If that warning bounces, ezmlm sends a probe; if the probe bounces, ezmlm automatically removes the subscriber from the mailing list.
• easy for users to control:
• edit ~/Participants/text/* to change any of the administrative messages sent to subscribers.
• remove ~/Participants/public and ~/Participants/archived to disable automatic subscription and archiving.
• user can put his own address into ~/Participants/editor to set up a moderated mailing list.
• user can edit ~/Participants/{headeradd,headerremove} to control outgoing headers.
• ezmlm has several utilities to manually inspect and manage mailing lists.
• uses Delivered-To to stop forwarding loops, Mailing-List to protect other mailing lists against false subscription requests, and real cryptographic cookies to protect normal users against false subscription requests. ezmlm can also be used for a sublist, redistributing messages from another list.

Provides:

• threaded digests
• multi-message get and thread retrieval in MIME multipart/digest with headers filtered to make the digest rfc1153-like (default). Messages can also be returned in true rfc1153 format, or as multipart/digest with unaltered headers.
• subject index of the archive
• Ezmlm behavior and output can be easily customized via idx.h.