With Toools you can program a job and create a Gantt chart connected with a database, the HSQLDB integrated in OOo by default or MySQL by using the instruction of User's Manual, and update the chart in real-time, by one (HSQLDB) or more (MySQL) users. The chart can be copy-pasted and also manually modified.
Toools also create a Python service into OOo, wich will be extended in the future.
Now it offer a list of printers, accessible simply from OOoBasic.

This extension is a temporary solution to Issue 15508 : Break link converts bmp, jpg, png and gif to png format. Currently, breaking links of jpg images produces a document of unacceptable size.

SemanticWebBuilder for OpenOffice is an extension to publish documents to SemanticWebBuilder Portal.

GureGipuzkoa addon lets you search and insert photos in your Writer, Impress or Calc document selecting them from GureGipuzkoa.net (a website with tons of historical and current photos from Gipuzkoa, a province of the Basque Country)

Frame selected pictures with waves in Draw and Impress. A Basic macro.

Рамка «Волна», обрамляет картинки рамкой с цветными накатами волн. Макрос на Basic.

This add-on lets an external program read text from the OpenOffice.org application. If you use it with an external text-to-speech program, it can help you to edit your writing or to compare your document's text with a printed document. It can help you to learn a new language or to find out how to say words you do not know.

Analyze how frequently you use the same words and use these words as tags for templates. This works for Calc, Writer, Draw, Impress. It will display you a dialog where you can see in the descending order how often what word was used in your document.

This tool enables to store and reload up to 10 different document sessions.

This little extension gives you an extra entry in the files menu Remove user information that removes all information about the user and user opdates from the current document. This is handy, if you send documents to others but don't want your personal information to be stored in the document.

This extension requires OpenOffice.org 3.1 or higher.

This extension add 4 themes to your gallery with almost 400 cliparts dealing with security at work, not as bitmap but as vector graphic in ODF format. In Draw, you may modify them or retrieve some parts to build your own signs : right click on clipart > Enter group. Then change color, add or remove elements...