BuiltWith - Find out the technology behind websites
Large - On-demand Slack bot that can get you anything for the office
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
Hivy - Organize & follow up on office requests in one place
What CMS - WhatCMS.org looks at a variety of factors within a webpage to determine what CMS a website is using.
Awesome PA for Startups - On-demand personal assistant over Slack & SMS