If on a Mac, most of mine have been mentioned... I would add Better Touch Tool. I use it to launch apps and trigger actions in apps from a global context. I th

If on a Mac, most of mine have been mentioned... I would add Better Touch Tool. I use it to launch apps and trigger actions in apps from a global context. I things mapped to the function keys and also presses on areas of the Trackpad. So for example, regardless of what app I'm using at the time, f19 will pop a new iterm window on my monitor that has focus. Ctrl and a numpad key will set the brightness of the monitor I'm using in 10% increments. Pressing (not touching) the top left or right corner of my Magic Trackpad will seek a few seconds backwards or forwards in Spotify. It's useful to control other apps without switching focus from the current app. I've looked into window snapping areas with it which are powerful, but I currently have it set up where a four finger swipe on the Trackpad sends the current window to the left or right half of the current monitor. I was planning something more elaborate, but it's become a reflex now. Alfred to launch apps by just typing the first few characters. I try to keep my fingers on the keys as often as possible. Jettison is good for ejecting and remounting removable disks when I put the machine in and out of sleep. I use an open source utility to limit battery charge level as my MBP is always hooked up to a dock these days.