How to quickly jump to another application without using command tab
If you press &#x2318;+&#x21E5; quickly, you switch to the last app used and the icons don't show up.

To make sure it works, &#x2318;+&#x21E5; to your browser. Then to your IDE. Then, quickly press the &#x2318;+&#x21E5; shortcut. You'll immediately switch to the browser. Do the same again to immediately switch back.

Hope this does it for you.