[adrianmonk]

Right, there's definitely a connection in the algorithms. They're all derivatives of the same family of stuff.

I could've been clearer, but when I said the only connection I saw between them was the Z, I meant the only connection between their names. In other words, while zstd surely has zip among its main influences, I'm not sure that the Z in "zstd" is there to convey "zip-like". It could be, or maybe it's just there because Z is generally associated with data compression.