Pennywise - Cross-platform application to open any website or media in a floating window
UI Garage - Specific mobile and web design patterns for your inspiration
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
Muzli - UI/UX and Design Inspiration Chrome Extension
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.
Design Hunt - Curated design inspiration for everyone