What Project Portals brings to Liquid Planner is the ability for more centralized organization and for others to get a view in to a group's work. They aren't set up by default, and the process to add them is a tad complex to do on a whim. But even so, giving clients a window in to the project completion estimates that Liquid Planner automatically generates might just be worth it.

The core functionality of Liquid Planner, offered on a hosted subscription basis, is real-time collaborative task management and project scheduling. Work can easily be viewed, scheduled, and updated through an interface broadly divided in to a folder-based view and a timeline visualization.

With a decent user experience and a breadth of features comparable to Basecamp, you might consider it a respectable alternative for project managers.