I've mentioned in the past how fabulous Celtx are, providing a free alternative to Final Draft, as well as including novel formatting software (which I will get around to trying at some point!). They also support a lot of new filmmakers through their Seeds grants. I have a serious amount of love for these guys.
I'm also pleased to announce a huge giveaway collaboration between Celtx and Pagan Writers Community (that 50k Facebook post I made a while back).
Loads of prizes up for grabs, including annual subscriptions for Celtx Pro Online Workspace worth $69.99 a pop.