Trend View is a spreadsheet program to help you find trends and features in data. It can open any size data file (not limited by row or column size), read from databases, plot assorted 2D, 3D and false color graphs, and supports math formulas and matrix calculations. The data and graphing windows are linked so you can move around in either and see the corresponding data/plot interactively. No installation required.
Full Specifications
What's new in version 4.3
Version 4.3 provides Matrix calculations, which supports nested operations.