Nibbler - Free tool for testing how good your website is, and what you can do to improve it. Check accessibility, SEO, social media, compliance and more.
Pennywise - Cross-platform application to open any website or media in a floating window
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
Zercurity - Monitor your infrastructure for policy non-compliance, live
Shopify - Shopify is a powerful ecommerce platform that includes everything you need to create an online store and sell online. Try it free for 14 days.
PiP-Tool - PiP tool is a software to use the Picture in Picture mode on Windows.