Yes, both GitHub and Planview LeanKit offer a Free Trial.
GitHub is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Planview LeanKit is designed for Large Enterprises, Medium Business and Small Business.
Pricing for GitHub Starts at $4/User/Month whereas for Planview LeanKit Starts at $20/User/Month.
Some top alternatives to GitHub includes LiveCode, Codeanywhere, Visual Studio IDE, CodeinCloud, GitLive, Microsoft Azure, GitLab, CodeSee and Bitbucket.
Some top alternatives to Planview LeanKit includes Quickbase , Smartsheet, ClickUp, Zoho Projects, Jira, Wrike, Teamwork, ProWorkflow, Workep, Kanbanize, Projectworks, Projectplace, Quick Base, Kanban Tool, Kanban Zone and KanbanFlow.