- WallabyJS - makes writing tests almost feel addictive, and being able to run and debug the JS directly in the code has saved me hours.
- Jetbrains IDEs - the refactoring and debugging tools are second to none.
- Jetbrains IDEs - the refactoring and debugging tools are second to none.
It might not quite be in the 100 hours bucket over the past 2 years, but it's close... using their toolbox app has made them much easier to keep installed/updated on my Linux workstation.