Yahoo Finance 

• Covers Canadian (TSX, TSXV) and U.S. exchanges (NYSE, NASDAQ, etc.)
• Real-time quotes, interactive charts, news, and portfolio tracking
• Free and easy to use

Investing.com 

• Extensive coverage of Canadian and U.S. stocks, indices, ETFs, and more
• Real-time quotes, charts, market news, and customizable watchlists
• Free with optional sign-up for extra features
  
  

TradingView

• Excellent charting platform with data from Canadian and U.S. markets
• Community-driven trading ideas and scripts
• Free tier offers a lot, with paid plans for advanced tools
  
  

MarketWatch

• Good coverage of Canadian and U.S. markets, plus financial news and analysis
• User-friendly interface with watchlists and stock screeners
  
  

TMX Money

• Primarily for Canadian stocks but also covers major U.S. indices and news
• Great for tracking Canadian stocks and cross-border market news