SublimeText has an excellent addon repository and gathers a growing community around it extending and making it better.

I know QtC is a binary app and is not near as pluggable as a python app, but now that we have in-place qmlpuppet compilation I would go and suggest a common Community Addon "Store". This Store would contain additional QtC plugins downloaded and compiled at wish (like the puppet).

If properly implemented this would make a good environment for community plugins, there would also be an enforced clause for all plugins: "If you upload a plugin you allow to make it standard part of QtC at some future", respecting some legal issues.

This is a suggestion, i think it would be nice to have.