The clever people at Froont have created a brief history of web design for designers. It’s pretty awesome, and you should check out the full post.
The dark ages of web design (1989)
Tables – The beginning (1995)
The golden era of freedom – Flash (1996)
Mobile uprising – Grids and frameworks (2007)
Responsive web design (2010)
The times of the flat (2010)
The bright future (2014)