Ideally suited for chemical laboratories, chemical training institutions and the like with a surplus of laboratory equipment or chemical literature: www.giftyourstuff.org Link. You can now donate your surplus inventory to a charity, particularly to schools in developing countries. The new website aims to close the gap between supply and demand. So to you affluent first world laboratory: did you recently bought yourself brand-new microscopes, NMR or HPLC equipment and don't now what to do with the old stuff? Simply leave a message at www.giftyourstuff.org and gift your stuff!
Disclosure: Family relation.