Simple notes in a panel, with a context menu item to copy text to a note.
The extension allows you to quickly save text notes on the sidebar of your browser.
Adds notes managed by tagging without hierarchized tree to sidebar.
Old school opera notes
SiteNotes: Used to create notes on the current URL open.
Nimbus Notes - The easiest way to taking notes and clip text/pictures from Web pages in Opera browser.
Save highlighted text for later to view. Highlight text and press (Ctrl + B) to save.
InstaNote Fast Creator
Create fast notes with a password, then edit it in a new tab. Simple and fast.