Page Ruler Redux

chrome plug in

WhatFont

The easiest way to identify fonts on web pages.

EditThisCookie

Browser Plug In

xScope

Measure, Inspect and Test

Ghostlab

Test multiple browsers and devices at once

Email on Acid

Empower Your Team to Deliver Email Perfection.

MintEmail

MintEmail.com is a no-click disposable email system

Gatling

Performance Testing Tool

Apache Jmeter

Open source load testing tool