A quick scrape of a few tumblrs, cached, updated hourly, so may be a wee bit behind the tumblr...see also: DS106 Random Gif API
Click on the gif to see a new one.
At the moment, this is very much to be improved.
It started with some gif scraping: Gifs, Gifs then DS106 Random Gif API and A grid of ds106 gifs
Blog post:106 drop in » Blog Archive » Gif Scraping and a DS106 Gif API
Sources:jjgifs, CogDogTumblog, Colin the dog Productions, Gifadog loves gifs, Rockylou Productions, MBS, StefanieJ2, Tom Woodward