Any YA book recommendations with a future technology theme?

Thousands,

What did you have in mind?

For example, the Norby series,

the White Mountian Trilogy,

Any of Heinlein's books,

the Lucky Star series by Paul French.

"Michael Vey: The Prisoner of Cell 25", first in a series of 7.

The Sky Chasers series by Amy Kathleen Ryan is set on a pair of generation ships (big slow spaceships that take decades or centuries to complete their journey, so the people who reach the destination are the descendants of the people who set off).

It's told from the point of view of some teens on one ship. The crew on the other ship, for reasons that eventually become clear, haven't been able to conceive any children, so they decide to take some young women from the first ship...

EDIT: The Mindjack series by Susan Kaye Quinn is pretty good too. It's set in a future where almost everyone is telepathic. The protagonist is one of the few who aren't.

You might also like the Ginny Dare series by Scott Roche, which is about a teenage girl and her father travelling from star to star on a spaceship, in search of riches and adventure.

Feed by M.T. Anderson

Little Brother by Cory Doctorow (it is YA but I think there is one small part with sex in it) (it is not in Public Domain but the author does let people read it through Project Gutenberg http://www.gutenberg.org/ebooks/30142 )

The Artemis Fowl series by Eoin Colfer has a mix of fantasy and technology.