Gerben

A browser extension that lets you grow your personal web of knowledge. Currently it lets you store pages you visited, and search through them.

Enables creating and resolving links to any selection of text in a page.

Hide view-reducing screen junk from websites. This extension hides all page elements that stick to your window, e.g. banners and popups, once you scroll down on the page. It may sometimes hide too much, but can be toggled on/off per website.

Watch videos without the distracting cruft around it, in the full window.

Enables bookmarking (or linking to) fragments of audio files.

Demonstrates the Web Annotation Discovery mechanism: subscribe to people’s annotation collections/‘feeds’, to see their notes on the web; and create&publish annotations yourself.