From Qt Apps:
Version 0.9.6 of QtiPlot, a data analysis and scientific plotting application, similar to Origin, based on Qt4, has been released. Changes:
- Implemented autocompletion for script editors and the possibility to display line numbers.
- Implemented confidence and prediction bands for fits. Improved the goodness of fit statistics.
- Improved the Fit Wizard.
- Improved the preferences dialog: added the possibility to customize the background of 2D plots.
- Added integration and linear regression from multiple table column selection.
- Fixed opening of Origin 7.5 files.
- Improved Python scripting engine.
- Fixed bugs concerning error bars.
- Fixed a few other minor bugs.
Screenshots linked off home page; downloads (source, binaries for various platforms in return for a maintenance contract) here. Requires Qt v4.3.2 or later (full requirements list here).