Remember that huge calculator you used to have in school, the one that was so massive that it needed its own case? Everything you ever wanted to do was mapped to a button on that calculator…but today’s discount software promotion condenses that functionality into a spreadsheet called GS-Calc!

GS-Calc is a spreadsheet that lets you track expenses, income, and sales while performing statistical calculations and data analysis with over 390 included formulas plus any number of formulas you can define yourself in DLL libraries. With GS-Calc, you’ll be able to edit huge text files and databases without even leaving the application, thanks to support for 12 million rows and nearly 16,384 columns. That is a lot of data!

Beyond the sheer magnitude of the GS-Calc spreadsheet is the impressive processing power of the program, combined with its agility and flexibility. Even the largest files load and save quickly. But use the program for pivot tables and advanced statistical functions, and GS-Calc uses up to 64 processor cores to boost calculations. You can even use up to 100 synchronized panes to multi-task like never before! And with support for export to PDF and import/export from TXT, dBase, Clipper, Fox Pro, and Excel XML formats, GS-Calc is the only spreadsheet you’ll ever need.

Please note folks: GS-Calc can use natively either the standard ODF *.ods spreadsheet format or it's native fast and compact binary format (for example: a spreadsheet with 20 million random numbers will be saved and loaded more or less instantly as a 150MB file).
Also, GS-Calc can be installed on any portable storage device. The installation requires about 7MB. No other libraries or run-times are required.

See what's new in the latest version 19:
https://forum-eng.citadel5.com/viewtopic.php?f=7&t=637

Loading, saving and filtering performance examples:
https://citadel5.com/help/gscalc/large_files.htm

Also, please notice the movies below detailing a few of the product's features:

Editing a workbook with 32 million formulas and 300 million random number/text cells using a 2.37GB workbook on PC with i5, 16GB RAM and HDD

Using the FILTER() function to filter 3.3 million rows.

Using MonteCarlo simulations to find sets of 100 numbers that add up to a give value.