Blogs and websites of individual practitioners and scholars
Robert Kosara:
https://eagereyes.org/
Enrico Bertini:
http://fellinlovewithdata.com/
Maarten Lambrechts:
http://www.maartenlambrechts.com/2016/12/29/the-list-of-2016-visualization-lists.html
David McCandless:
http://www.informationisbeautiful.net/
Alberto Cairo:
http://www.thefunctionalart.com/
Andy Kirk:
http://www.visualisingdata.com/
Lev Manovich:
http://manovich.net/
Manuel Lima:
http://www.visualcomplexity.com/vc/
Edward Tufte:
https://www.edwardtufte.com/tufte/
Yuri Engelhardt:
http://yuriengelhardt.com/
Jan Willem Tulp:
http://tulpinteractive.com/
Fernanda Viégas & Martin Wattenberg:
http://hint.fm/
Online forums and portals
https://www.reddit.com/r/dataisbeautiful/
http://datadrivenjournalism.net/
Pedagogical sites
http://www.improving-visualisation.org/
http://seeingdata.org/developing-visualisation-literacy
http://www.datavizcatalogue.com/
https://github.com/ft-interactive/chart-doctor/blob/master/visual-vocabulary/Visual-vocabulary.pdf
http://chartmaker.visualisingdata.com/
Research groups
http://www.ii.uib.no/vis/index.html
Award sites
http://www.malofiejgraphics.com/
https://www.globaleditorsnetwork.org/programmes/data-journalism-awards/
http://www.informationisbeautifulawards.com/