Yes, both Trello and Unito offer a Free Trial.
Trello is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Unito is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Trello Starts at $5/User/Month when Billed Yearly whereas for Unito Starts at $10/Month when Billed Yearly.
Some top alternatives to Trello includes Basecamp, Wrike, Smartsheet, Zoho Projects, monday.com, Asana, Teamwork, ProjectManager.com, Microsoft Project, Worksuite, Trackboard and Height.
Some top alternatives to Unito includes TeamGantt, Teamwork, ProjectManager.com, Microsoft Project, ProWorkflow, Plan, Projectsly by 500apps and Height.