Not a program, but being very familiar with the keyboard shortcuts in SublimeText has saved me countless hours of dev time. Things like Ctrl-D to highlight multiple instances of a word, plus the ability to put on Caps checking in the search bar first so you're only highlighting correctly capitalized versions. Make the same change in multiple locations. Saves so much time. Knowing how to highlight a letter, a word, a…
Also the low latency is amazing. Sublime on an old laptop feels batter than VS Code on a fancy new desktop.