By definition, a grant is a gift. It is not a loan and you are never asked repay it. A grant can originate from any one of several, such as the federal government, your state government, a corporation, a foundation or a non-profit organization.
Sometimes, you receive actual cash. Most of the time, you receive services and the provider gets the cash. The format does not matter, you are still receiving a grant, someone receives money and you will never receive a bill. There you have it: a free cash grant. Formulate a clear need and it has the potential to become a reality.
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The reason you search for a free cash grant is that you do not have the necessary money to pay for something you need. Grant money is targeted cash. However, no one will come to your door and offer money to you. You must ask for it by explaining your needs in detail to the appropriate sponsor. That sponsor looks for statements of need, plan of attack, expected outcome and your evaluation of actual outcome.