Is there a link with explanations for common ships?

[Tigermisu]

I keep seeing stuff shuch as "Skycranes" or "SSTOs"

is there a link here in the forums where it explains all of these?

[UmbralRaptor]

There's a lot of terminology borrowed from real life. skycrane comes from how Curiosity landed. SSTO is single stage to orbit

[Eric S]

Not that I'm aware of.

A skycrane is a rocket that carries the cargo underneath the rocket rather than on top. This is usually used to deliver a rover or a base component, where the cargo needs to be on the ground itself, rather than on top of a rocket. NASA's skycrane doesn't even come close to the ground, it lowered curiosity on a cable, then moved away and crashed in order to not contaminate the area that curiosity would first explore. That's generally not possible in KSP, so in KSP people either drop the cargo from a very low altitude, or actually touch down, detach, then fly the skycrane away.

SSTO is "Single Stage To Orbit." Basically, it means that the craft doesn't drop anything from the time it launches to the time it is in orbit. Some people assume this means a spaceplane, but there are SSTO rockets in game, and there are even some SSTO rockets on the drawing boards in real life, though I'm not aware of any that have actually been launched.