HootSuite - Enhance your social media management with Hootsuite, the leading social media dashboard. Manage multiple networks and profiles and measure your campaign results.
Imagus - The extension is intended to complement image features that (I think) is missing from Opera by...
Buffer - Buffer makes it super easy to share any page you're reading. Keep your Buffer topped up and we automagically share them for you through the day.
Image Max URL - Help find larger or original versions of images, including a customizable image popup feature
SproutSocial - Sprout Social is a social media management tool created to help businesses find new customers & grow their social media presence. Try it for free.
Thumbnail Zoom Plus - The official site of the Thumbnail Zoom Plus add-on for Firefox