Sublime is just a text editor, a pretty mighty one. Personally, I’ve been using SciTE so far because it’s just plain simple, yet has some very nice features (<3 CTRL-Q). I’ve been playing with Sublime recently too and found it pretty powerful for SH modding, but I haven’t decided yet whether I’ll continue using it. It’s making some things a lot easier, but I’m afraid of change.
Decoda can be used to debug lua, or rather could as I don’t think it works with luaJIT at all. It’s also slowing your game down a lot and most of the time, it’s just not worth it. Personally, I rely on logging the hell out of the game instead (I’ve had several MB log files of two minutes of gameplay at some point), for which I’ve made my own little tools (Jelly’s print/printf namely).
The Chrome Dev Tools require you to download CEFs packages (for that build), or at least used to - I’m not sure if they’re now distributed in the game. @Miturion’s list isn’t complete either I think. See also: