Ora Basic is a great start (up to its limits of 10 members), but the Pro plans have some fantastic premium functionality to offer:
Project Observers – Add clients or stakeholders to your projects for free. Observers have limited access, but they can watch how the project progresses and comment on tasks.
Recurring Tasks - Repeat a task on a daily, weekly or monthly basis.
List actions - trigger a reaction like an assignment, labeling a task, or changing its status when it's moved to a specific list.
Task Relationships - mark tasks as a parent, child, duplicate, related or blocking one another.