Email Hosting Providers

SPFSPF

SPF Usage Statistics · Download List of All Websites using SPF

The Sender Policy Framework is an open standard specifying a technical method to prevent sender address forgery.

Web Servers

ApacheApache

Apache Usage Statistics · Download List of All Websites using Apache

Apache has been the most popular web server on the Internet since April 1996.

LiteSpeedLiteSpeed

LiteSpeed Usage Statistics · Download List of All Websites using LiteSpeed

LiteSpeed web server is a high performance, highly scalable Apache interchangeable web server.

Operating Systems and Servers

Apache Tomcat JKApache Tomcat JK

Apache Tomcat JK Usage Statistics · Download List of All Websites using Apache Tomcat JK

Apache Tomcat is an open source software implementation of the Java Servlet and JavaServer Pages technologies.

OpenSSLOpenSSL

OpenSSL Usage Statistics · Download List of All Websites using OpenSSL

The OpenSSL Project is a collaborative effort to develop a robust, commercial-grade, full-featured, and Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength general purpose cryptography library.