Yes, both Microsoft Excel and GitHub offer a Free Trial.
Microsoft Excel is designed for Individuals, Large Enterprises, Medium Business and Small Business.
GitHub is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Microsoft Excel Starts at $5 whereas for GitHub Starts at $4/User/Month.
Some top alternatives to Microsoft Excel includes SpreadsheetWEB, Apple Numbers, Zoho Sheet, Google Sheets, Retable, Rows, LibreOffice, iWork and Sheet2APi.
Some top alternatives to GitHub includes LiveCode, Codeanywhere, Visual Studio IDE, CodeinCloud, GitLive, Microsoft Azure, GitLab, CodeSee and Bitbucket.