==== dummy ====
  * https://www.portfoliovisualizer.com/backtest-portfolio - powerful tool to backtest portfolios.
    * For example, you can use this to check whether Costco outperformed SP500 in the last three years.
  * https://desitravelcompanion.com/ - to find a travel companion for parents traveling overseas.
  * https://www.cpubenchmark.net/market_share.html - AMD vs. Intel CPU Market Share
  * https://marketingreportoptout.visa.com/OPTOUT/request.do - opt out of VISA marketing.
  * https://puzzlepaheliyan.com/ - Puzzles and riddles with answers and explanations.
  * https://www.worldtimebuddy.com/ - Useful for questions like \\ If it is 7 am in USA, what is the corresponding time in India?
  * https://www.kaggle.com/competitions
  * https://www.classtools.net/Venn/
    * Used it to make a Venn diagram on 2023-10-24