Outside of the articles that are posted on this site, hear are some links to sites that I find useful

World of Warship Development Blog (Facebook)
https://www.facebook.com/wowsdevblog/

World of Warships Wiki
http://wiki.wargaming.net/en/World_of_Warships

WoWs Fitting Tool by Aesis
https://wowsft.com/

WoWStats
http://www.wowstats.org/

WoWs Stats and Numbers
https://na.wows-numbers.com/

WoWs Tactical Planner (for Clan Battles or Scrims)
http://en.wowstactic.tk/

WoWs Clan Search
https://clans.worldofwarships.com/clans/gateway/wows/search