The FreeDublin.com guide to some of the best giveaway sites:

gumtree.ie lists all sorts of free stuff available in Dublin

adverts.ie has a "freebie" section where people display there unwanted goods.

iolfree.ie gives away free samples, sign up for the newsletter to be kept up-to-date.

dublinwaste.ie "one man's rubbish is another man's gold"

jumbletown.ie everything here is free to take away.