These are in no particular order, no explanations given 😎
PHP
- CommonMark ➡️ commonmark.thephpleague.com
- Flight ➡️ github.com/flightphp/core
- PhpStorm ➡️ jetbrains.com/phpstorm
- PHP (see what I did there 😉) ➡️ php.net
Python
- Python ➡️ python.org
- Django ➡️ djangoproject.com
Whatevers
- Bootstrap ➡️ getbootstrap.com
- Ubiquiti ➡️ ui.com
- Passbolt ➡️ passbolt.com
- Matrix ➡️ matrix.org
- Borland Pascal, Virtual Pascal, Free Pascal, and Lazarus (R.I.P. Niklaus Wirth)
- Bumblebees 🐝 en.wikipedia.org/wiki/Bumblebee
- Aikido ➡️ en.wikipedia.org/wiki/Aikido
- BOFH
- Proper vanilla ice cream 🍨