Yes, both GitHub and CloudApp offer a Free Trial.
GitHub is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
CloudApp is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for GitHub Starts at $4/User/Month whereas for CloudApp Starts at $8/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 CloudApp includes Scribe, FireShot, Snapup, RecordScreen.io, Snagit, Droplr, Jumpshare, Screenrec and Snippyly.