Testamentary Will

Handwritten, unwitnessed wills are recognized in about half of the United States.  You would need to determine if your specific state recognizes these wills, which are called often "holographic" wills.

A Testamentary Will that is properly executed can guide the Probate Court through your estate to ensure that everything is handled the way you wanted it to.  One of the common difficulties with a Testamentary Will is that it still must proceed through the probate process, likely costing the estate additional time and money that could have been left to loved ones or to charities rather than going to the executor and the attorney handling the estate in fees.