What version-control system is most trivial to set up and use for toy projects?

Question

I teach the third required intro course in a CS department. One of my homework assignments asks students to speed up code they have written for a previous assignment. Fact

Answer 1

Subversion is easy to install, on windows, linux and mac os x. I don't know what program they are programming in, but the subclipse plugin for Eclipse is fairly easy to install and hides away some of the repository complexity.

And repository complexity? That's simply having a trunk, tags and branches folder within each project anyway. And they might not have much time, but they should get the time to learn SVN (or similar) because it is a skill that looks good on their CV.