Links

• Nagios
• Zenoss Core
  • Note: Zennos Core is the open source version.
• scribe
• flume
• ganglia
• 10 Free Server & Network Monitoring Tools that Kick Ass
• serverfault: Server management tool for small network
• Monitoring websites
  • pingdom
    • dns
  • uptimerobot

Network Sniffers

• URLSNARF
  • urlsnarf outputs all requested URLs sniffed from HTTP traffic in CLF (Common Log Format, used by almost all web servers), suitable for offline post-processing with your favorite web log analysis tool (analog, wwwstat, etc.).