- Visual Studio Code - I like more than the paid version (that I have a subscription for)
- SQL Server Management Studio execution plan modes - it is a gem that few people know about and even fewer can utilize it effectively to make 10 second queries run in 30 milliseconds.
- Composer (PHP) as my first encounter with package management, years ago.
- Notepad++ - the only mini-tool available in production
- Virtual machines and snapshots. Never fear again about ruining the work environment and helping a lot with having separate dev/stage/prod environments without breaking the bank. Also a way to split and separate my environments, the laptop is for emails, VM's for everything else.
PS. I am not a programmer, I am officially a manager and mostly an architect, but I write code to keep current