A network security analysis and monitoring toolkit Linux distribution.
Enhanced Apache Server Status page - for one or multiple servers
Command line tool for managing Amazon S3 and CloudFront services
Xplico is a Network Forensic Analysis Tool (NFAT)
PCAP from another point of view
Open Source SIEM
Energy and environmental monitoring of the server room
Collects data about network useage using libpcap.
Hierarchical Cluster Engine project
Monitoring your infrastructure for free.