The blog post!
https://ammorack.wordpress.com/ <--- not bad
http://www.thearmoredpatrol.com <------ my prefered WG news aggregate/blog
https://vk.com/wotclue <------ Russian FB WOT site. pretty interesting stuff since they get press releases we don't in the West
http://www.vbaddict.net/wot.php (dont forget to use the ADU!) Hacked and down for the moment hopefully to return soon
http://www.tanknumbers.com/en/index.php some really in depth info if you want to dig for it. the site is clunky but it works and there's some really nice stuff in there.
http://www.wotinfo.net/en mostly camo but has other stuff too.
Wotlabs.net (duh) theres some amazing things out there to find but you have to google Fu it or use the wayback machine sometimes
https://www.13disciple.stream/l2p-guide.html <---damn good
an amazing resource and some really good explanations on mechanics and the how and why of WoT. see also his chart on Arty stun EXP distribution
http://na.wotzilla.com <---- down, dead and gone these days. a shame. a sequel is in development
http://wotnumbers.com/ <--- Wotnumbers.exe. good local program if you don't want mods or net based.
http://forum.worldoftanks.eu/index.php?/topic/185348-09201-wot-replay-analyzer-wip-2-30102017/ <---- ReplayAnalyzer.exe also a good program but requires every replay to be saved seperately. (all instead of Last battle)
http://tvtropes.org/ this place is a black hole. its fun to get lost! look up your favorite media and dive in!