Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
UI Garage - Specific mobile and web design patterns for your inspiration
Anchor CMS - Free and lightweight blogging system
Muzli - UI/UX and Design Inspiration Chrome Extension
Textpattern - Textpattern is an elegant content management system that is free, open source software.
Design Hunt - Curated design inspiration for everyone