Matrex is a lightweight vectorial spreadsheet. It calculates blocks of values, not single cells. It is strongly multi-threaded. Users can work together on sheets using a server. It has adapters to MATLAB, Scilab, Octave, and R.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
The big step forward of this version is the new ISQL module. The ISQL module is a function template to apply SQL queries to vectors in a Matrex project. Other enhancements are the ability to print matrices and presentations, the ability to export matrices and presentations to CSV and XLS, and the ability to import data from a database using an SQL query. Menus were added to remove multiple items, duplicate matrices and functions, and add a function from a matrix (the function will have the matrix as the first argument). A summary step was added for the expression parser. The colors of the windows headers can be changed.