Eduflow - Digital learning that actually teaches students something
Imagus - The extension is intended to complement image features that (I think) is missing from Opera by...
Flowlingo - Get fluent in a language through content immersion
Thumbnail Zoom Plus - The official site of the Thumbnail Zoom Plus add-on for Firefox
NowComment - NowComment is a complete suite of collaboration tools, streamlining group discussion, annotation, and curation of texts, images, and videos.
Image Max URL - Help find larger or original versions of images, including a customizable image popup feature