Asana is the 800-pound gorilla of task management for teams, dwarfing other popular services like the capable Trello. Asana is all about workflows and checkbox tasks that can be assigned to individuals. The Android app lets you take your tasks on the go and offline, syncing your progress when you're back on the network. It's a powerful tool with an excellent interface, and new features are added regularly.
Dropbox pioneered the personal cloud service, where all your stuff would be available no matter what device you were using. On Android, it holds its own—even against the highly integrated Google Drive. Dropbox can also act as a seamless backup for your images, automatically uploading every photo to the cloud. It even includes some light image editing tools. If you're the type of person with lots of files already stored in Dropbox, this app is a must-have. Droid Apps