UK Campaigning costs:
http://crowdfunder.co.uk/p/free-assange

Legal costs: http://crowdjustice.com/case/assangeappeal

USA: assangedefense.org/donate/

EU-wide: http://wauland.de/en/donate/moral-courage (select Julian Assange)

Australia: http://action.assangecampaign.org.au/donate

Toolkit: stellaassange.com