EuroOffice Chart Map is a new chart type integrated into OpenOffice.org Calc and through the Sun Report Builder into OpenOffice.org Base that makes it possible to visualize geographically related data. Showcase your statistics over detailed maps of the world!

Add the missing thousands separator button to OpenOffice.org Calc toolbar.

By default Calc ships with a solver engine for linear programming only. This allows the optimization of models to a certain degree.
However, if the formulas or constraints become more complex, nonlinear programming is required. That missing gap is now filled by the Solver for Nonlinear Programming extension.

Currently it incorporates two Evolutionary Algorithms which are able to handle floating point and integer variables as well as nonlinear constraints. For more information about their usage and restrictions, please refer to the documentation.

This extention is strong recommended for all calc users, it allow remove/insert column easier eventhough selected range is merged.
It work on new openoffice.org calc. Tested version included 2.3.1 and 3.0.
Features:

1. Insert new toolbar which allow user add/remove columns or rows.
2. Allow user to perform mass vertical or horizontal merge easily for range of cell.

Calc2LaTeX is an OpenOffice.org Calc (Spreadsheet) macro for converting tables. It makes making tables on LaTeX very easy.

This extension will allow you to select a region in a spreadsheet, and generate a LaTeX tabular format of the spreadsheet.

Supports:

Embedding the tabular environment in a table float
Caption on top or bottom
Label
Placement options [htbp], etc.

En : AutOOofilter creates instantly a data range and then an autofilter. This allowes the creation of several autofilters in Calc.

Fr : AutOOofiltre crée instantanément une plage de données et un autofiltre. Cela autorise la création de plusieurs Autofiltres dans Calc.

This is an OOo-macro that will read GnuCash output data and import it into OpenOffice.org's embedded database, so that thereafter you can evaluate them e.g. in OOo-Calc. A description on its use can be found on http://www.alice-dsl.net/gnuc2ooo/index.html.
Important notice: This macro will be outdated with the release of GnuCash 2.4, as it will then be possible to save your GnuCash data directly into one of the common SQL-databases. Ooo-base can then be used as frontend on that database. See www.gnucash.org for further information.

CalcLink: Bringing the Power of Mathematica to OpenOffice Calc spreadsheets!

With CalcLink you can use the power and sophistication of Mathematica in Calc, and you can use the familiarity, convenience, and ease-of-use of Calc from Mathematica!

The entire breadth of all Mathematica functions becomes easily accessible from Calc, enhancing the Calc spreadsheet environment with symbolic computation, optimization methods, modern statistical functions, data-mining, lightning-fast giga-numerics, linear algebra functions, and state-of-the art visualization!

Obba provides a bridge from spreadsheets to Java classes. With Obba, you can easily build spreadsheet GUIs (Excel or OpenOffice) to Java code.

This extension generates a data input form for tables in calc, reproducing the Data - Form feature of Microsoft Office Excel.

Installation
Double-click on the extension file and follow the instructions.
After installation close both OpenOffice.org and the Quickstarter (the icon in the traybar), and start OpenOffice.org again.