Q-Stats - Get free marketing insights for every question on Quora.
Loader.io - Loader.io is a simple cloud-based load testing service
Seoxan - check seo report for any website, alexa ranking, server information, meta tags, authority, page speed and more
WebLOAD - WebLOAD - The most flexible and cost effective software for enterprise load, stress and performance testing, integrated with DevOps processes. Click for details
HypeStat - HypeStat is free statistics and analytics service, where you can find information about every website.
Apache JMeter - Apache JMeter™.