Here’s links to things I like.

Fun

Science

  • Google Scholar – Find science papers.
  • Sci-Hub – Read science papers for free. (No link because it changes often; try a net search)
  • Examine – Evidence based nutritional supplement reviews.
  • LabDoor – Supplement purity testing.

Tangible

Audio

  • Audacity – A nice free audio editor.
  • Opus – A nice free audio codec, good for low bitrates.
  • Vorbis – Another nice audio codec.

Etc

  • Pulsar – Free customizable code editor, fork of Atom.
  • OpenSCAD – Make 3D models by writing scripts.
  • Brave Search – A nice search engine which doesn’t track you.