Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Next-Generation Intrusion Prevention System (NGIPS) - Cisco Firepower NGIPS (Next-Generation IPS) provides contextual awareness, security intelligence, and advanced threat protection against attacks and malware.
Facebook Local - Discover places to go and events happening near you
snort - Snort is a free and open source network intrusion prevention system.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Suricata - Suricata is a high performance Network IDS, IPS and Network Security Monitoring engine.