These are the ones I will definitely be using in my classroom:
Instagram can be a fun and educational tool in any classroom. You can use it to communicate classroom happenings with the parents. You, or the students, can take pictures of favorite activities and post.
The Vine app is also great for showing parents what is going on in the classroom. You can also give the students a task and they can video themselves completing that task.
Pixton was my favorite comic creator. The features are so much more friendly than the others. Students can create a comic based on information learned in class.
Biblionasium is a great way to communicate reading lists to parents and students. Parents are always asking what level or type of books to read at home. It would be awesome to send parents to this website where all that information is already there.
These are the ones I won't be using again:
Screenr was not a website that worked for me. I think it is important to use websites that are consistent in how they work. I do not want to use a site that may, or may not, work when my students try to use it.
ToonDoo was another unpredictable website for me. I created my comic just fine, but it took days for my comic to appear on my profile page. That just won't work for a classroom teacher. Students will want the instant gratification of seeing and printing their comic.
If you are not already familiar with my favorites, I hope you will give them a try.