- PacketLife's Armory - encryption, exploitation, intrusion detection, forensics, vulnerability scanning, system monitoring, packet crafting, spoofing, ...
- IpCisco's Network Tools - packet analyzers, security audit, simulators, intrusion detection, ...
- packages found in Debian Linux for generating packets and sending, useful for testing openflow controllers: packeth, ostinato, netexpect, tgn (simpler netexpect), sendip, 4g8 (l2 interception)