Yes, both Planview LeanKit and GitHub offer a Free Trial.
Planview LeanKit is designed for Large Enterprises, Medium Business and Small Business.
GitHub is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Planview LeanKit Starts at $20/User/Month whereas for GitHub Starts at $4/User/Month.
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.
Some top alternatives to GitHub includes LiveCode, Codeanywhere, Visual Studio IDE, CodeinCloud, GitLive, Microsoft Azure, GitLab, CodeSee and Bitbucket.