Sender IDSender ID is an anti-spoofing email framework heavily based on SPF.View websites using Sender ID →
HSTSSecurityForces browsers to only communicate with the site using HTTPS.View 5,919,739 websites using HSTS →
UbuntuOperating systemsUbuntu is a free, Debian derived Linux-based operating system, available with both community and professional support.View 506,175 websites using Ubuntu →
Google PageSpeed1.13.35.2CachingWeb server extensionsPerformanceView 73,773 websites using Google PageSpeed →