Gforge-plugin-extratabs is a little plugin which let each project add their own tabs on their project page. Those tabs are simple links to any URL they want. Each project can list in this way any external resources available to them. This is particularly interesting when, for historical reasons, a project decided to not use a Gforge tracker but to keep their old bug tracker, for example Bugzilla. This plugin has been developed for the Adullact.net forge: http://www.adullact.net