Educational sites:
investopedia.com
khanacademy.org
Live CNBC stream:
newslive.com
Pre-Market Data and Live data:
tradingview.com
finscreener.com
investing.com
Screeners:
finviz.com
tradingview.com
etfdb.com
Calendars
marketwatch.com
cmegroup.com
Boomer Investing 101:
bogleheads.org
Misc: