Absolutely free mathematical program with "paper-like" interface and numerous computing features (now with integrated mathematical reference book). Key features: 2D and 3D plot creating; Numeric and symbolic calculations; Matrices, vectors, fractions etc; Data export to HTML format; and many others. SMath Studio has the following features: Systems, matrices, vectors, complex numbers, fractions. Support of the following operations and functions: Addition, subtraction, multiplication (scalar and vector), division, finding of factorial, raising to power, roots, determination of modules, trigonometric functions, inverse trigonometric functions, hyperbolic and inverse hyperbolic functions, logarithms, determination of signature, calculation of an argument, determinants of matrices, transposition of matrices and vectors, minors of matrices, algebraic additions to matrices, calculations of matrix trace, ranking, conversion of complex numbers from algebraic to trigonometric form. Display of 2D and 3D graphs of functions for variable "x". Symbolic and numeric differentiation (derivatives) are available. Availability of inserting text regions into a worksheet. This feature is automated, so when the user inserts text or formula, the program will detect it and the user does not have to select "Menu" "Insert" "Text region" option in the menu. Export of created worksheets into html format - creation of web-pages. Support of parameters (constants and user-defined parameters). Unlimited size of worksheets and their quantity. Copy, cut, paste, and delete of expressions and/or parts of expressions. Tracking history of changes (undo, return). Possibility of saving and opening of created worksheets while working in SMath Studio (.sm) file format. Automatic saving of user's preferences while exiting the program. Possibility to change the font size of expressions, as well as their colors and background color. Support of devices with any screen resolution and screen orientation (starting from 240x240 pixels and higher). Full VGA support. Support of 18-th interface languages. SMath Studio now supports Mathcad files to open (files with .xmcd extension). Added ability to save MathCad files (in .xmcd file-format) Requires: Microsoft .NET Framework 2.0.