TNW
Yes, both AppInstitute and GitHub offer a Free Trial.
AppInstitute is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
GitHub is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for AppInstitute Starts at $42/Month when Billed Yearly whereas for GitHub Starts at $4/User/Month.
Some top alternatives to AppInstitute includes AppYourself, Bizness Apps, A2Zapps, Apphive, Native, geekApps, 2OS App Builder and AppMaster.io.
Some top alternatives to GitHub includes LiveCode, Codeanywhere, Visual Studio IDE, CodeinCloud, GitLive, Microsoft Azure, GitLab, CodeSee and Bitbucket.