Pragma - The home base for Ethereum developers.
MetaSurvey - MetaSurvey provides light and high engagement surveys for e-commerce.
Telnyx SMS API - Build global text messaging right in your app
BuiltWith Toolbar - Reveals the tech underneath a website. Browser extension.
Notif.me SDK - A Node.js lib to send all your transactional notifications
Similar Tech - SimilarTech offers a Sales Insights platform which helps companies uncover their ideal market by crawling the sourcecode of over 300M sites.