Drupal

This is not, by far, a complete list. However it has some usefull modules for several common Drupal tasks

• Drupal API's overview
• D8 Form API
• Modules
  • Clean UI
    • Form Tips
    • Automatic Entity Labels
    • Hide Revision Field
    • Ajax Loader
    • Dropzonejs
  • Paragraphs
    • Paragraphs
    • Paragraphs Sets
    • Paragraphs Collection
    • Paragraphs Block
  • Migration
    • Migrating Taxonomy Term References
    • Migrating Files
    • Migration Survival Strategies
  • Layout Builder
    • Layout Builder Styles | Drupal.org
    • Layout Builder Enhancements | Drupal.org
    • Layout Builder Restrictions | Drupal.org
    • Layout Builder overview | Drupal 8 guide on Drupal.org
    • Views Layout | Drupal.org
    • Layout Plugin Views | Drupal.org

Javascript

• Many polyfilllllies. Polyfill.io
• Frameworks
  • Svelte
  • Ember
  • Meteor
  • Polymer
  • Brunch
• Tools
  • P5.js
  • Swiper
• Canvas
  • Fabric
  • Cytoscape

CSS

• Css Grid layout Grid by example: Very usefull examples for the (relatively new) grid display option.
• Screensiz.es List of various devices and their specs.

Open source / Privacy

• Matomo.org Open source analytics
• Drupal
• Fileshare
• Disroot Net-neutrality tools
• Remotestorage (unhosted apps)

PHP

• Generate PDF from html (wkhtmltopdf)

Fotografie

• Rotjeblog Samen met Judith fotografeer ik Rotterdam.
• roproprop.nl Een combinatie van mijn eigen foto's en foto's van anderen die ik leuk vind.

Filosofie

• non-dualiteit
• The Immanent Frame

Other

• thesearchenginelist.com List of search engines for all sorts of searches like books or people. Many of them are no-longer usable, but it is a good list non the less.
• http://freemusicarchive.org