Yes, both GitHub and Google Calendar offer a Free Trial.
GitHub is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Google Calendar is designed for Large Enterprises, Medium Business and Small Business.
The starting price of GitHub begins at $4/User/Month, while pricing details for Google Calendar are unavailable.
Some top alternatives to GitHub includes LiveCode, Codeanywhere, Visual Studio IDE, CodeinCloud, GitLive, Microsoft Azure, GitLab, CodeSee and Bitbucket.
Some top alternatives to Google Calendar includes Appointy, Calendly, Cogsworth, Scedule, Book Like A Boss, Meetin.gs, Calendar.AI, EasyCalendar, Office Tracker, MeetingPlanner.io, DaySchedule, Fantastical Scheduling and Calendar.