this plugin provides access to the plugin marketplace http://plugin.suenkel.org
with community contributed plugins
select your preferred release: stable, beta, alpha, developer
More info: http://plugin.suenkel.org/blog/
Keywords: marketplace, autoinstaller, third-party-plugin
Thanks @csuenkel2 for this work! At this stage we have discussed in the team and decided to go ahead and build a simplistic plugins.piwik.org Rest API + UI.
We will use most likely php slim framework and have to improve "Manage Plugins" Piwik capabilities (ie. install from URL, upload ZIP, check for plugin updates, update all plugins, install plugin from the marketplace).
Therefore we won't go ahead with your project but we appreciate the effort and direction and it is inspiring.
The new Piwik Marketplace is discussed this ticket: #4053 and will be released soon!