Charitable Remainder Trust
is a tax exempt and irrevocable trust that is eventually donated to charity, but only after the beneficiaries have received either a percentage of the assets as income over a period of time. The charity, then, receives the remainder of the trust.

Charitable Lead Trust
is a taxable irrevocable trust that provides income to a charity for a period of time. When the trust terminates, the remainder is paid to the beneficiaries, typically without federal estate tax.