"I love it when I come across such educators curated lists of apps because I know since these apps are reviewed by fellow teachers then there is a high possibility that they will work for other teachers in different settings too.
For instance, the wonderful work embedded below and which has been created by the folks in St.Plunkett Oliver Primary School http://www.stoliverplunkett.qld.edu.au/Pages/default.aspx ; is a great library of apps that every teacher should have the chance to explore. It contains a set of useful apps pertaining to different categories. Most, if not all of these apps, have been already reviewed here in Educational Technology and Mobile Learning before but it is much more practical to see them compiled and organized all in one page."
Via John Evans, Stefano Magliole