There are alt algs like R U R' U R U L' U R' U' L and its inverse that might not be as fast, but are easier to remember (as combinations of Sunes/Niklases).
Let's look at the algs Fred gave for the 2 corners cases. I'll rate them as easy or hard, but that's relative. By "hard" I don't mean that they're horribly random sequences, just that they're not easy. Call them "normal" if you prefer.
Sune is easy, mostly because of how often we use it. Double Sune adds an extra U' R' U R, still easy. Triple Sune adds one more U' R' U R, still easy. I didn't know the terms double/triple Sune until now, but I use them for the H columns case and the L pure case.
