UI Garage - Specific mobile and web design patterns for your inspiration
Square Online Store - Build your own online store with Square
Muzli - UI/UX and Design Inspiration Chrome Extension
Swell.is - Customizable, API-first ecommerce platform for innovative brands, startups, and agencies.
Design Hunt - Curated design inspiration for everyone
WooCommerce - A freely available eCommerce plugin that enables shop facilities on your WordPress website. Functionality enabling extensions & beautiful themes available.