For those that missed some, here they are:
- FreeIPA http://www.freeipa.org/
- Lynis http://www.rootkit.nl/projects/lynis.html
- Kismet https://www.kismetwireless.net/
- MailWatch http://mailwatch.sourceforge.net
- SOMAP.org : http://www.somap.org/
- OpenSC http://www.opensc.org/
- SiLK http://tools.netsa.cert.org/silk/index.html
- Snare http://www.intersectalliance.com/
- Ettercap http://ettercap.sourceforge.net/
- RTIR http://www.bestpractical.com/rtir/
- IPCop http://www.ipcop.org/
- EJBCA http://ejbca.sourceforge.net/
- FreeRadius http://freeradius.org/
- ClamAV http://www.clamav.net/
- OpenVPN http://openvpn.net/
- Osiris http://osiris.shmoo.com/index.html
- NTOP http://www.ntop.org/
- Nikto http://www.cirt.net/nikto2
- OSVDB http://www.osvdb.org/
- p0f http://lcamtuf.coredump.cx/p0f.shtml
- Bastille-Unix http://www.bastille-unix.org/
- WireShark http://www.wireshark.org/
- OpenVAS http://www.openvas.org/
- Metasploit http://metasploit.com/
- OSSEC http://www.ossec.net/
- Snort http://www.snort.org
- OSSIM http://www.ossim.net/
Enjoy!