Not strictly a deal, but I like to use this website at Christmas for those who 'have everything' or sometimes for those i care about who ask not to receive a gift. In the spirit of HUKD, I do think the prices are very reasonable though and there is a good variety of causes to choose from.
Gifts start from only £5 (50 bowls of rice for 50 hungry children) and you do get some gift packaging too if you like such as a cracker.
Main link takes you to gift selection.
Links to further information about how it works here: https://www.goodgifts.org/how-it-works