WPThemeDetector!

WebTech Detector will let you know that which plugins and themes have been used to provide it that look and functionality. WebTech Detector will provide you all the details about plugins, along with the details of Wordpress parent and child themes.

What WordPress Theme Is That is a free online tool allows you to easily detect what WordPress theme a site uses (including parent and child themes). It will also detect what WordPress Plugins are being used.

WhoisWP is a fast, intuitive WordPress theme detector that will instantly answer the question "What WordPress theme is that site using?"

The WordPress Theme Detector tool by Satori helps you identify which WP theme a website uses - in just one click. It uses advanced proprietary algorithms to correctly identify even heavily modified themes and outputs only the most important information - the parent theme used by the website.