how to make a simple library?

hello all

is there a tutorial anywhere on how to make a simple arduino library?

i would like to package up some routines to make them easier to use for others.

(for example, for processing there is this: so i'm looking for something a little like that; or even just a "hello world" type arduino library)


whoops answered my own question, found a little link: (sorry, had tried google and forum search without luck!)