This is a list of software which is not available as a binary package on Debian and some of it is very rarely used worldwide.
- gatling as a webserver.
- ?qmail-ldap for Email
- ?svlogd a
- djbdns for DNS servers, resolvers and tools.
djbdnsis not so exotic as one might think, but it is not available on Debian. - runit is available as binary package on Debian, but who knows how much persons use it. The same is valid for daemontools.