GS-Calc is a spreadsheet application that will help you to organize your data, create reports, handle large text files and databases.

Its main features include: 12 million rows x 4,096 columns; organizing worksheets in a trees with nested folders; efficient memory usage to quickly load and save multi-GB files; fast 12mln-row pivot tables; optimization and statistical functions; using up to 64 processor cores during calculations; can use functions/engines written by users in C/C++ as plain DLL libraries; a unique feature of working in up to 100 synchronized panes to boost your productivity; GS-Calc can be also installed on any portable storage device and used without performing any system registry modifications (save the uninstall key); two optional native file formats: Open Document .ods spreadsheet format and fast and compact binary native format; match/look-up functions with regular expressions; support for JScripts & VBScripts; organizing scripts hierarchically in trees; 2D/XY and 3D charts capable of handling very large amounts of data; saving workbooks or selected data to compact PDF; supported read/write formats include ODF *.ods, any text files, Excel 2003 XML, XLS, dBase, Clipper, FoxPro; around 390 built-in functions including matrix decompositions; linear equation sets with improving iterations; least squares (weighted, constrained), regression with orthogonal polynomials; time series analysis; minimization; linear programming, integer programming and quadratic programming. Available COM interfaces enables you develop your own programs using GS-Calc functions.