What do you mean that such designs have never been found? Designs are found all around us. All over there is order and proportion. It is just a matter of perspective. An atheist believes that everything around us is ultimately the product of chance, weighing the odds against the vastness of the universe. In such a case, an atheist sees evolution as a cause. At some point, matter made a jump from non-life into life, on this planet and possibly others as well. A theist on the other hand believes that the jump between life and non life was at the very least, facilitated by some higher entity, a creator or designer.<quoted text>
Intelligent design is the claim that life contains designs - patterns that can only be explained by positing an intelligent, deliberative, and potent designer.
Such designs have never been found, just claimed. For example, the flagellum and the clotting cascade were both claimed to be intelligently designed based their designs, which were called irreducible complex.
But the claim of irreducible complexity, unlike the claim of an intelligent designer, is falsifiable, and was shown to be wrong.e.
Creationists believe specifically in "the hand of God", but ID need not necessarily believe so. Creationists believe in irreducible complexity "some things can just never be explained", but with ID, one can endeavour to explain things and one can believe that everything can theoretically be explained.
A person who believes in ID and creationism, believes God built the factory of life and is designing and building each and every thing in that factory. A person who believes in ID and evolution, believes God built the factory and now the factory can run itself (which would far more intelligent than the creationist attitude). A person who does not believe in ID, believes the factory came to being over millenia of chance and randomness.