Automatically reload your node.js app on file change with Gulp (https://github.com/wearefractal/gulp).

Gulpfile.js

var gulp = require( "gulp" );
var spawn = require( "child_process" ).spawn;

var node;

gulp.task( "server", function() {
    if ( node ) node.kill();

    node = spawn( "node", [ "app.js" ], { stdio: "inherit" } );

    node.on( "close", function( code ) {
        if (code === 8) {
            gulp.log( "Error detected, waiting for changes..." );
        }
    } );
} );


gulp.task( "watch", function() {
    gulp.watch( [ "./app.js" ], "server" );
} );

process.on( "exit", function() {
    if ( node ) node.kill();
} );