bitvoodoo has developed some free plugins:
Language Plugin
With the Language plugin you can have the same content in different languages on the same Confluence page. The user sees content only in the language which is set in the user settings.
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Navitabs Plugin
This plugin provides a very simple solution which allows users to navigate between pages. It generates horizontal or vertical navigation tabs that look just like the tabs in Confluence.
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Panelbox Plugin
Panelboxes are useful to structure text on a wiki-page and are very easy to use. Confluence Administrators configure a set of panelboxes in the plugin configuration. The user then just picks a pre-defined box without having to deal with half a dozen macro parameters and their values in order to match the cooperate identity, like it is the case with the Confluence {panel} macro.
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Viewtracker Plugin
Have you ever wondered, not only how many people visited a Confluence page or blog post you wrote, but also who read it when and how many times? The viewtracker plugin gives you the answers to exactly those questions, because it is more than just a simple visit-counter.
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Voodoo Plugin
The voodoo plugin allows you to replace keywords on a Confluence page with values derived from URLs, labels, page titles, user details and space information.
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