Yes, both GitHub and Rindle offer a Free Trial.
GitHub is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Rindle is designed for Large Enterprises, Medium Business and Small Business.
Pricing for GitHub Starts at $4/User/Month whereas for Rindle Starts at $9/User/Month when Billed Yearly.
Some top alternatives to GitHub includes LiveCode, Codeanywhere, Visual Studio IDE, CodeinCloud, GitLive, Microsoft Azure, GitLab, CodeSee and Bitbucket.
Some top alternatives to Rindle includes Todoist, Wrike, Smartsheet, TeamGantt, Teamwork, ProWorkflow, Workep, Watchwork, WirTask, Today, Flowist, Routine Ops, ClickUp and SmartTask.