A friend recently asked for some help finding an online appointment setting system because they found themselves spending far too much time exchanging emails and voice messages. The wanted something simple, preferably free and with the ability for somewhere down the road for their customers to pay through the system as well.and#160; Based on those parameters, I suggested they take a look at and#160;http://www.acuityscheduling.comand#160; Anyone in any business that has the need to set appointments will find having a single point of contact where customers can schedule their own appointments like what Acuity offers is a big time saver The free service is really basic, so if you need to customize the system or take payments through the system, you will need to spend $15 to $25 a month.and#160; The simplicity of the tool allowed my friend to get setup quickly which meant they simply needed to create a "book an appointment" link on their website.and#160; Acuity syncs with lots of popular calendars, allows for group appointments and the system knows which time zone each party is in.