We’ve talked about Google SideWiki and other methods for “Writing in the Internet’s Margins”, but what about some of the other web annotation services out there? This post talks about ...

Collaborative annotation of web pages is something many people are working on. The newest entrant in the field, Fleck, is launching tonight at the ...

Web annotation tools like Genius and Hypothesis let you add notes to any page on the internet. Will they become tools for serious discourse, or end up as a mostly ignored layer of digital graffiti?

Maha Bali shares her experience learning about Hypothes.is for web annotation and how she plans to use her favorite feature: public annotation ...

I am not a big fan of Web annotation services that let people add their own virtual Sticky Notes or comments to Web pages for others to see. But Web annotation is back with the launch today of ...

W3C standard annotation is a fundamental upgrade to the web that will bridge information silos and enable far easier content sharing and reuse ...

Annotation service now has a professional version for users who want to mark up PDFs along with normal Web pages.

Google's Martin Splitt introduces the concept of Centerpiece Annotation and how different parts of a web page are analyzed and weighted ...