Muzli - UI/UX and Design Inspiration Chrome Extension
Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.
UI Garage - Specific mobile and web design patterns for your inspiration
Wondershare PDFelement - All-in-one PDF editor
Design Hunt - Curated design inspiration for everyone
Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.