This is probably one of the most exciting new companies to come into the online display ad market. (If you find online advertising interesting anyway) Of all the online building systems I’ve used, this one just feels so much nicer. Flashtalking and Sizmek’s HTML factories are a bit clunky, Celtra was clearly thought up by a developer and not a designer. This, and the ability to plug in your creative into almost any known ad serving platform, as well as the one-click translation functionality. It really is a very promising bit of kit.