Pluma plugins
Convincing Gnome2 plugins to work with Pluma seems to be pretty straightforward.
This is a development release of the Class Browser plugin for pluma.
The plugin is intended to be used by those who uses pluma as a source code editor. It spares you reopening the documents that were loaded last time you closed pluma.
Switch between document tabs using Ctrl+Tab / Ctrl+Shift+Tab (in most recently used order) and Ctrl+PageUp / Ctrl+PageDown (in tabbar order).