kgoToRighto.js

var things = righto(function(done){
 
    //Something async
    setTimeout(function(){
        done(null, 1);
    }, 100);
 
})
var stuff = righto(function(done){
 
    //Something async
    setTimeout(function(){
        done(null, 2);
    }, 100);
 
})
var whatsits = righto(function(things, stuff, done){
 
    //Something async
    setTimeout(function(){
        done(null, things + stuff);
    }, 100);
 
}, things, stuff)
var dooby = righto(function(things, done){
 
    //Something async
    setTimeout(function(){
        done(null, things/2);
    }, 100);
 
}, things)
var result = righto.mate(whatsits, dooby)
result(function(error, whatsits, dooby){
 
    //Done
    console.log(whatsits, dooby);
 
});