Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Apache HTTP Server - Apache httpd has been the most popular web server on the Internet since April 1996
Event Hunt - Startups and Tech Events Curated By Locals
Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
LiteSpeed Web Server - LiteSpeed Web Server (LSWS) is a high-performance Apache drop-in replacement.