Local pass store
A password manager with local storage, a bit like old WAND.
Astronomy picture of the day
This extension shows the current 'Astronomy Picture Of The Day' in a speeddial window.
Bobble lives in your pc, take good care of him :)
Open in (background) tab
Extends the context menu of selected text to open an URL in a new tab.
Filter request headers
Block certain values (cookies, etc.) from http request headers.
Simple Bookmark Sidebar
This extension shows your bookmarks in Opera's sidebar.