A good toolkit doesn't make you a better developer on its own, but a bad one adds friction to every single day of work. These ten show up, in some form, on almost every real project we've touched.
The pattern across the list
Notice that none of these are about a specific programming language — they're about the parts of the job that are the same regardless of stack: version control, testing an API, inspecting a running page, and getting code from a laptop to production without drama.



