WhatsFake - Make fake conversations that look just like WhatsApp
Hover Zoom - Enlarge thumbnails on mouse over.
iPhoneFakeText - iPhoneFakeText is one of the best and most powerful tools for writing long & funny texts for iPhone devices.
Imagus - The extension is intended to complement image features that (I think) is missing from Opera by...
Fake Call and Sms - Fake Call and Sms app is a fake message sender and caller app that provides features through which you can receive as well as can send simulated messages to desired contacts.
Image Max URL - Help find larger or original versions of images, including a customizable image popup feature