Command line
SS64 Forum
DosTips
PowerShell forum (TechNet)

Tools
Passwords
Google Translate/Trends
BitLocker keys
Conversions
Color Management Test
Down4All / Just.Me
Doodle / Trello
Outline
PortCheck
Regexr
ScreenCapture
SSL Labs
JustDelete.me
VirusTotal

Data/hosting
Box
imgur
Send.Firefox
SendSpace
WeTransfer

Tech
Arstechnica
HackerNews
OSNews
TheRegister

Blogs
EFF deeplinks
NetCraft
Schneier

email
Gmail – basic
Calendar
Outlook
Yahoo / FastMail

Music
Bandcamp
Steve Hoffman forum
Radiolab
DR Database / LdP

Courses
Harvard / MIT / Yale
duolingo / Codecademy
Coursera / Udacity / Edx

News
Google News
NY Times
The Guardian
New Yorker
BuzzFeed
Reuters / NPR

Shopping
Amazon:
Books, DVD,
Music, Deals

KK Cool Tools
PC Keyboards
TheWirecutter

Travel
GoogleFlights
Kayak
Rome2Rio
SeatGuru
OpenTable

Maps
Google Maps / MyMaps
Open Street Map
Bing maps
Weather.io

Search
Google / ncr
GoogleAdvanced
history/activity/ads

Duck Duck Go

Zeitgeist
NewsBlur
PopURLs
Hyperallergic
Metafilter
Tumblr
Twitter
Waxy
XKCD

Photo/video
Flickr
Golden Hour
Photo.net
Vimeo
YouTube

Wayback Machine
World Time
Wikipedia