Combot - The most advanced community management tool for Telegram.
BuiltWith - Find out the technology behind websites
Community Bot - Automate your Slack community management
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
Teleme.io - "The easiest way to manage telegram groups. TeleMe's flexible tools are designed for any telegram community. Plan ahead, set bot rules and track member interactions. From anti-spam to daily scheduled tasks tools, we've got you covered".
What CMS - WhatCMS.org looks at a variety of factors within a webpage to determine what CMS a website is using.