Development tools overview
Overview of the development tools that can be used to develop with Drupal.
Drush
The most popular Drupal development and sysadmin tool
Editors and IDEs
Instructions for setting up various text editors and integrated development environments (IDEs) for Drupal development
DrupalPod
DrupalPod guide
Develop on Windows
Now that Microsoft natively bundles a Linux subsystem on Windows 10+, it should be the de-facto development environment.
Set up your browser to make your work easy
Setup browser quick search to search Drupal API documents.
XHProf Code Profiler
XHProf is a utility for profiling PHP. Unlike Xdebug profiling, it profiles both CPU cycles and memory usage (Xdebug 2.0.0RC4 and later only
Xdebug debugger
For advanced development a debugger may be very useful. A debugger will allow you to follow program execution and its effects, to observe
Disabling and debugging caching
Disabling caching (render cache, dynamic page cache, Twig cache) during development is useful for seeing changes without clearing the cache
Enable verbose error logging for better backtracing and debugging
Enabling detailed backtracing can help shed more light on the causes of warnings and errors
Working efficiently with the command line
How to work efficiently using tab completion, aliases and other shell tricks
cspell
Drupal Core uses cspell to ensure all of the code is spelled correctly in "American English".