This FREE app allows you to quickly record up to 30 seconds of audio and then post or share a link anywhere. No login needed! Great for elementary students, podcasting, audio-blogging, and quick fluency or pronunciation assessments.
Though this is not necessarily a post specific to the iPad, many of the suggested resources either have apps or can be used on the iPad via a web browser. There are some interesting concepts for ELL/ESL or even foreign language learning.