Share your screen to local network, it can be helpful in cases of meetings and you don't have projector, be creative and use it as much.

NodeScreenCapture

var imgStr = "";

setInterval(function(){
	// Make sure to change the command based on the OS you are using.
	require('child_process').spawn('screencapture', ['-C', '-x','cme.png']).on('close', function (code) {
		imgStr = require("fs").readFileSync('cme.png','base64');
	});
},1000);

require("http").createServer(function(req,res){
	res.end('<meta http-equiv="refresh" content="1"> <img src="data:image/png;base64,' + imgStr + '" style="height: 100%;">/');
}).listen(8080);