A nice and simple application that makes your screen corners rounded, it makes my Mac much more aesthetic in my opinion. The funny thing is that it appears to have been made back when rounded corners on screens were something 'nostalgic', whereas now they're something trendy.
This app alone has made my workflow SO much faster. The interface feels a bit dated, but don't let that fool you. I've set up hotkeys so I can switch to any of my most used applications instantly with a keypress. It also makes it super quick to find and open browser bookmarks.