This is a Great Collection of articles with a big impact on the Web Design scene. Collected by Jordan Moore.
Also available as mobi version for your Kindle: Instapaper–2013-11-12.mobi

MINDSET

• A Dao of Web Design by John Allsopp (2000)
• Responsive Web Design by Ethan Marcotte (2010)
• Mobile First by Luke Wroblewski
• There Is No Breakpoint by Ben Callahan (2013)

TYPOGRAPHY

• Compose to a Vertical Rhythm by Richard Rutter (2006)
• More Perfect Typography by Tim Brown (2011)
• Fluid Type by Trent Walton (2012)

COLOUR THEORY

• Never Use Black by Ian Storm Taylor (2012)

CONTENT

• Made to Measure by Allen Tan (2012)
• Content Choreography by Trent Walton (2011)

PHILOSOPHY

• Atomic Design by Brad Frost (2013)
• Of Bears, Bats and Bees: Making Sense of the Internet of Things by Scott Jensen (2012)