The GS-Calc application was developed to be a small, fast and portable all-purpose spreadsheet that will help you to better organize your data. Track your expenses and incomes, create reports, search and edit databases, perform statistical calculations.
GS-Calc does the job quickly, easily and efficiently. GS-Calc supports ODF natively. It can be installed as a fully portable application and run from USB drives.

· 12 mln rows x 4,096 columns.
· ODF spreadsheet format as the default file format.
· Around 300 built-in formulas including specialized numerical functions: matrix operations and decompositions (LU, Cholesky, SVD);
· linear equation sets;
· with Gauss and Cholesky methods and improving iterations;
· least squares (weighted, constrained), regression with orthogonal polynomials;
· time series analysis;
· minimization;
· linear, integer and quadratic programming.
· Array formulas and 3D-formulas;
· UDF functions accepting and returning arrays.
· Workbooks containing any number of hierarchically organized worksheets.
· Multi-pane worksheet windows with up to 100 freely sync views;
· advanced sync options.
· 2D/XY and 3D charts capable of handling very large amount of data.
· Hidden formulas and cells excluded from printing. Printing watermarks.
· Strong password protection and encryption; password-protecting workbook structures and individual cells.
· Dual COM interfaces enabling you to use GS-Calc functionality in your own applications.
· Standard editing and formatting tools and options; optional Excel-, OpenFormula- and GoogleDocs-compatible formula syntax, predefined numeric styles and user-defined styles.
· Clean installation (no registry entries are required); optional fully portable setup.
· Saving workbooks to PDF: saving entire workbooks (with the worksheet tree structure preserved), single worksheets, pages, ranges and single charts; very small output files.
· Importing, exporting and editing text, dBase III-IV, Clipper, FoxPro 2.x and Excel 2003 XML files

Limitations:
· Printing the first page only and up to 15 worksheets in one workbook
· 30 days evaluation period

What's New in This Release:
· Workbooks are now updated/recalculated several (and more) times faster
· New Match(), vLookUp() and hLookUp() function can optionally use more advanced
· flags/options aside from the standard 1,0,-1. Depending of those options the functions
· can perform linear and binary (tens/hundreds of times faster) searches, use specific
· sort options, string comparisons funcions, pattern matching etc
· GS-Calc 9.0 offers pivot tables as pivotData() array formulas. Using a new
· "Insert > Pivot Table Formula" dialog box it's easy to enter even the most complex
· pivotData() formulas
· New formatting tools/windows
· Bug fixes and other minor improvements and changes