30/30 (Free for iPhone, iPad) is an icon-based productivity manager which allows kids to make lists of tasks and the amount of time to get them done. Self TODO (Free for Android) is a decent substitute for 30/30.
Evernote(Free for iPhone, iPad, and Android) organizes all your project information such as notes, to-do lists, photos, articles, and more, and allows you to share them with others.
Symbaloo bookmarks your apps and games on the cloud in a visual, user friendly way. This is helpful if you want to share them with parents.
Type on PDF (Free for iPhone and iPad. iOS 6 and below). Lets you write text on PDF files. Has been replaced by Smart Forms for iOS 7. A free Android substitute is Fill and Sign PDF Forms