This photoalbum was inspired by jnavrati Photo Album extension. I used some pieces of his code in my extension. Also I used some external sorting module. This extension was build with BasicAddonBuilder extension. Some features this album provides:
- Alphabetical order of images (could be important for linux users)
- Human sort available (also for linux users)

Openoffice plugin providing integration with GoogleDocuments and Zoho.
Features:

• Upload of (multiple) documents (Text, Spreadsheet, Presentation) to Zoho
• Download of documents (Text, Spreadsheet) from Zoho
• Upload of (multiple) documents (Text, Spreadsheet, Presentation) to GoogleDocuments
  

This extension enables you to increase or reduce the font size of the selected text

eVoice is an easy-to-use extension to embed voice comments in your slides. It provides the capabilities of recording and adding audio commentaries to your slide shows.

The Sun Presentation Minimizer is used to reduce the file size of the current presentation. Images will be compressed, and data that is no longer needed will be removed.
The Sun Presentation Minimizer can optimize the image quality size. Presentations designed for screen or projector do not require the same high quality as presentations designed for print.

Provides integration with clker.com online clipart to openoffice.org. Simply, the cliparts you choose and save to your clipart basket, will appear in the extension window inside openoffice.org. Better, we have almost all cliparts in ODG format, SVG and PNG so you don't have to worry about compatibility issues.

The Creative Commons Licensing extension provides the ability to select and embed a Creative Commons license in Writer, Calc and Impress documents. In addition to embedding the license in the document metadata it provides a visible notice in your document.

This extension convert recursivly Microsoft Publisher document in OOo format (impress)

...but this not the perfect converter : I don't parse the pub file : I just use Publisher COM component.
So Publisher has to be installed !
Anyway, I think it can be usefull for a lot of people "captive" of Publisher.

Create with Photo Album, using just four clicks, a slideshow from a folder of pictures with random fades automatically applied between slides, and the slideshow set to loop continuously.

This extension provide an easy way to crop images in Draw or Impress.
Have a look at http://www.alicvb.com for more details.