The Free and Open Productivity Suite
The program was first released in 2001 as OpenOffice Calc, but it was donated to Apache in 2011. This spreadsheet was created as an open-source replacement for Microsoft Excel. The organization is trying to update the software daily, and you may see some wonderful improvements that will make your job easier.
It works on a variety of systems, including Windows, Mac OS X, and Linux. Case planner and language processing formulae are two of the main features of this spreadsheet program.