I have made yet another small Opera extension for adding a “Email page” button on the main toolbar and in page context‐menus. Mailto button adds a toolbar button to send the current page via email using your default email client or service.
You can also right‐click on a page and choose “Email page” to achieve the same effect. The toolbar button can optionally be hidden from the Extension manager.
The extension can be used together with other extensions, such as Gmail Compose to send the page using web services such as Google Mail.
As with the other extensions, the source‐code is available on GitHub. Requests and bugs are welcome on GitHub, and reviews and comments in Opera’s extension catalog.
Update June 2015: Please note that I do not intend to maintain this extension in the future as I kind of lost interest in Opera. The source code is available under a permissive MIT License for anyone interested in updating it in the future.