tmux is great, as a web developer I use it all the time. At first I thought "who needs a terminal multiplexer" but after having used tmux for a while now, I can't go without it. If you find yourself switching...
I work in an office as a JavaScript developer and am generally the go-to guy for any Mac / OSX problems people have. Whenever I do some pair programming I hear "wow, what's that tool you're using called?" a lot....
As a developer you probably spend a lot of time using the terminal. Whether you only use it a couple of times a day or day in day out, your terminal should feel good. If your terminal still looks something like this:
You're...
Being productive is something that us developers value a lot. We try to automate everything so there's little repetitive work left to do. Unfortunately there are still loads of developers who minify their JavaScript & CSS using online tools and refresh their browser...