Trello, Inc.
Trello looks a lot like Pinterest, but it’s actually a portal where you can create job lists, and within them, task cards to share with your staff. You can drag and drop cards between lists to show the progress of a particular project: Did the plumber arrive and install the new sink? Your assistant manager can drag that task from the “to do” to the “done” list. Users can add as many people and as many lists as they like and see everything about any project just by glancing at the board, which updates in real time. You can add checklists, labels and due dates and upload files from your computer, Google Drive, Dropbox, Box and OneDrive. Notifications let you know when things are happening.
Free
For: Android and iOS