Pennywise - Cross-platform application to open any website or media in a floating window
SquareSpace - Squarespace is the easiest way for anyone to create an exceptional website. Pages, galleries, blogs, e-commerce, domains, hosting, analytics, 24/7 support - all included.
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
WiX - Create a free website with Wix.com. Customize with Wix' website builder, no coding skills needed. Choose a design, begin customizing and be online today
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.
Google Sites - Access Google Sites with a free Google account (for personal use) or G Suite account (for business use).