The Code Smells plugin for SonarQube allows developers to manually (i.e. during code reviews) report issues not seen by SonarQube but which should be taken into consideration when evaluating a project's technical debt.
If you want more information, read the project's rationale and have a look at the list of Code Smells types the plugin allows you to report.
Installation and usage Documentation is available on the project's wiki.
New feature ideas and contributions are more than welcome. A Google group named Code Smells has been created in order to facilitate discussions about this plugin.
I hope you'll enjoy this small plugin as much as I enjoyed writing it ! Do not hesitate to request new Code Smells types and send comments as well as requests for improvement.