Steve,

The plugin architecture is on the roadmap for 0.3, and the basic requirements for it are currently being pondered by myself and Brennan.

See the discussion at http://lists.roundcube.net/mail-archive/roundcube.dev/2007/01/

Sam Bailey

Steve Ellis wrote:
Has there been any work done on a plugin API? It would be a great feature to be able to write a plugin and almost literally drop it in with out having to edit major files which will be overwritten in the next release. on the forums there was mention of a word-press like plugin system (I vote for the widgets =) which would be an excellent way of managing them.

This would open the doors for a plugin community to fill those 'not so popular' needs that would be considered bloat in the main trunk, so users can select which bloat they want.