Emotional design/giveaway: Mailchimp is giving away hats for cats (the giveaway is just about over right now). Here’s the video that the page linked to.

Giveaways: BestVendor List-a-thon givewaway. None is complete with the right gear, with the right timing (around the iPhone5 launch). 

#Pair Giveaway: @Pair is giving away something that its audience will love: 2 iPhones. There’s a lesson there somewhere. Give away something that your target audience would love to have and let them share the news. 

Here’s a screenshot of how they handle the contest.

Give aways (produce things that people love): Mailchimp (@mailchimp) is giving away a coloring book for children with its logo chimp as the main persona.