Here is an offer I've just received from the popular cloud based accounting company Xero.
Basically if you sign up for a trial and upgrade your trial to a full Xero account before 31 December 2012, use the promo code XERFEST13 and pay nothing until 1 February 2013.
Saving of up to $128 (if choosing the top Xero plan)
Follow these steps:
Log in to Xero.
Click on the Purchase link next to your organisation.
Apply the promo code XERFEST13 after selecting a pricing plan.
Is it 3 months free with a purchase or 3 months free no purchase required?
Looks like they won't start charging you until February, but is there any ongoing commitment?