GS-Calc is a spreadsheet that can be used for various purposes thanks to its scalability: simple tracking your expenses, editing CSV/text files with millions of rows, XLSX/XLS files that are automatically split and merged, building complex data models with millions of formulas and tens of gigabytes of data or more.

You can use 32 million rows x 16,384 columns, a unique feature of organizing worksheets in a tree form, pivot tables with 32 million rows, up to 64 processor cores during calculations, Monte Carlo Simulations to easily estimate risk in business, costs, future pensions or simply to reverse-calculate formulas etc. You can use functions written by users in C/C++ as plain DLL libraries; work in up to 100 synchronized panes to boost your productivity. GS-Calc can be installed on any portable storage device and used without performing any registry modifications. It offers binary match/look-up functionality for more precise and fastest possible searching; regular expressions; support for JScripts & VBScripts; organizing scripts hierarchically in trees; 2D/XY and 3D charts capable of handling millions of data points; a complete set of functions to import, export and convert data in the CSV, text, dBase, Clipper, Fox Pro, xml, xls/xlsx file formats; around 450 built-in formulas including solver functions: linear programming, mixed linear integer/binary programming and quadratic programming.