With Pictello (Mac, iPad, iPhone), voice and words can be added to pictures; great potential for content areas and class summaries (trips and such). Recommend.
Free version allows 15 minutes (10 PPts narrated and turned into videos/month)...some adds, however, and no animation. Great potential for student presentations
On this free website, you enter text and it's reworded--might be worth an look. It indicates that it helps with vocabulary development and comprehension.