Very fast and very flexible SIP server
libsmtp is a library that enables developers to integrate SMTP sending capabilities into their programs. It is written in C, but a C++ wrapper should be available someday. Is is licensed under the LGPL, so that it can be included in non open-source stuff,
Luz is a GPL IRC Services. It's purpose is to offer a quality free software product, instead of the closed source available ones. It's designed mainly -but not limited to- for ircu based ircd's.
Sophie is a daemon which allows the use of the 'libsavi' library from the Sophos anti virus vendor ( www.sophos.com ).
Qscanq scans every email message submitted to qmail before allowing it to be added to qmail's mail queue. Infected emails are rejected, not bounced, so you won't have to deal with double-bounces during virus outbreaks.
VIRCu "Virtual IRCu" Development