DP/PX Converter
Calculate pixels (and other units) in DPs
Units & measurements - Layout - Material Design
Device Metrics - Material Design
A comprehensive resource for sizing, resolution, and more across multiple devices.
Your Best Work Will Be Invisible
Principles Of Minimalist Web Design, With Examples
XD Essentials: The Art of Minimalism in App Design
Marvel Styleguide
Swiss Confederation Web Guidelines
How and why we built the Marvel Styleguide
Designing a styleguide: elements that go into building compelling products
Delightful Bits Of Vintage Graphic Design Inspiration
Color Theory For Designers: Creating Your Own Color Palettes
Color Theory For Designers, Part 2: Understanding Concepts And Terminology
Color Theory for Designers, Part 1: The Meaning of Color
Easy Steps To Better Icon Design
Improve Your Designs With The Principles Of Closure And Figure-Ground (Part 2)
Improve Your Designs With The Principles Of Similarity And Proximity (Part 1)
Designer's guide to DPI
This guide is designed as a "get started" or introductory read for the starting to intermediate designer who wants to learn or get more knowledge about cross-DPI and cross-platform design from the very beginning.
Pixel-fitting
all icons sets (UX Repo)
Japonizer -和風壁紙素材ツール
Japanese traditional background generator
Typetester
... is an online application for comparison of the fonts for the screen. Its primary role is to make web designer’s life easier. As the new fonts are bundled into operating systems, the list of the common fonts will be updated.