Written? Kitten! is described as 'For every 100, 200, 500, or 1000 words you write, Written! Kitten? will reward you with a kitten picture randomly selected from Flickr's "most interesting" photos' and is a anti procrastination tool in the news & books category. There are 2 alternatives to Written? Kitten! for Mac, Windows, Linux and Web-based. The best Written? Kitten! alternative is Write or Die. It's not free, so if you're looking for a free alternative, you could try Nothing To Say.
Write or Die is an application for Windows, Mac and Linux which aims to eliminate writer's block by providing consequences for procrastination and rewards for accomplishment.
Nothing To Say is a writing app with a running text line that doesn't let you edit the text as you go
