Strutta is really neat site that lets you very easily create contests (for free) where people can enter videos, images, or text. Multiple winners can be judged by popular vote or by the contest creators.
It has a ton of other “bells & whistles,” too.
Teachers can set-up these contests or, even better, students can create their own. With a little direction, English Language Learner students should be able to navigate the site.
I think there are a ton of ways this can be used in fun and engaging ways for language development.