Yes, both Riter and Flow offer a Free Trial.
Riter is designed for Large Enterprises, Medium Business and Small Business.
Flow is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Flow begins at $6/User/Month when Billed Yearly, while pricing details for Riter are unavailable.
Some top alternatives to Riter includes Todoist, Wrike, Smartsheet, ProWorkflow, Watchwork, Taskworld, WirTask, Today, Flowist, Taskwall, ClickUp, TaskSift, Flow and SmartTask.
Some top alternatives to Flow includes Quickbase , Smartsheet, ClickUp, Zoho Projects, Wrike, TeamGantt, Teamwork, ProjectManager.com, Microsoft Project, ProWorkflow, Trackboard, TaskBranch, Quick Base, Height, Task Flow and Project Insight.