The folks over at Rocketgenius just released a new video showcasing their premier product, Gravity Forms. I try to promote this plugin, and I use it on all my sites and my client sites. It is difficult to explain, since it is so much more than just a contact form generator. Gravity Forms is a fully integrated forms solution. I think they really nailed it with this video.
Want more info on Gravity Forms or ready to purchase? Use the handy banner on the right, or just click the link. Gravity Forms