Yes, both GitHub and Jitbit Helpdesk offer a Free Trial.
GitHub is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Jitbit Helpdesk is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for GitHub Starts at $4/User/Month whereas for Jitbit Helpdesk Starts at $24.92/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 Jitbit Helpdesk includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Apptivo, Teamwork Desk, HelpDesk, SysAid, ReadyDesk, AzureDesk, Help Desk Premier, BoldDesk and Scopedesk.