Mac CLi - OS X command line tools for developers
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
Phunt - Product Hunt command line interface
BuiltWith - Find out the technology behind websites
GitHub CLI - Official CLI tool for using GitHub from the command-line.
What CMS - WhatCMS.org looks at a variety of factors within a webpage to determine what CMS a website is using.