Open Source Backup Tool

Creating Images Of Your Linux System With SystemImager

SystemImager is software that makes the installation of Linux to masses of similar machines relatively easy. It makes software distribution, configuration, and operating system updates easy, and can also be used for content distribution, You can even update from one Linux release version to another! SystemImager can also be used to ensure safe production deployments. By saving your current production image before updating to your new production image, you have a highly reliable contingency mechanism. If the new production enviroment is found to be flawed, simply roll-back to the last production image with a simple update command!

LibreOfficeCalc - Open Source Spreadsheets

LibreOffice Calc is the spreadsheet component of the LibreOffice software package. Since forking from OpenOffice LibreOffice Calc has undergone a massive re-work of external reference handling to fix a large number of defects in formula calculations involving external references, and to boost data caching performance especially when referencing large data ranges.

Gnumeric - Open Source Spreadsheets

Gnumeric is a spreadsheet program that is part of the GNOME Software Desktop Project. Gnumeric is distributed as software under the GNU GPL license; it is intended to replace proprietary and other spreadsheet programs such as Microsoft Excel. Gnumeric has the ability to import and export data in several file formats, including CSV, Microsoft Excel , Microsoft Works spreadsheets (*.wks), HTML, LaTeX, Lotus 1-2-3, OpenDocument and Quattro Pro; its native format is the Gnumeric file format (.gnm or .gnumeric), an XML file compressed with gzip.
Gnumeric's accuracy has helped it to establish a niche for statistical analysis and other scientific tasks.

WikiCalc - Open Source Spreadsheets

wikiCalc is a web application, created by Dan Bricklin, that allows for the creation and editing of spreadsheets through a wiki-style user-editable interface. It is currently released as version 1.0 for use on Windows, Mac, Linux/Unix, and other platforms that can run the Perl language.