Here are the recommended resources for producing great webinars … some of these are broader than simply webinars but must-haves for making the best use of webinars today:
Books: Content Rules — this is THE definitive guide to content marketing. See the chapter on Webinars specifically but the whole book is worth 100 times its weight in gold.
Screen recording software: Camtasia (PC or Mac) and Screenflow (Mac)
Website hosting: HostGator — best in the business, hands down!
Essential Ingredients to Running a Website with WordPress: