==== links I came across ====
  * https://quant.stackexchange.com/
  * https://stats.stackexchange.com/
  * https://lifehacks.stackexchange.com/
  * https://cooking.stackexchange.com/
  * https://codegolf.stackexchange.com/ - recreational programming competitions
  * https://softwareengineering.stackexchange.com/
  * https://codereview.stackexchange.com/
  * https://worldbuilding.stackexchange.com/ - for writers/artists using science, geography and culture to construct imaginary worlds and settings

  * https://stackexchange.com/sites - all stackexchange sites
  * https://cs.stackexchange.com/ - computer science