Today, the lyric explanation startup tries to achieve its destiny with the launch of its new genius.it/ prefix that lets you add annotations to any web page. Just put the prefix before a URL like ...

The tool is a GUI that uses Inkscape and qpdf to convert a PDF page to an SVG file, set it as a locked background, then let the user add any annotations they desire, using Inkscape as the editor.

PDF is one of the most widely used formats for sharing and viewing documents, especially in professional and educational settings. From business reports and academic papers to eBooks and user ...

Diigo—an Evernote-style program that lets users annotate and save Web pages—is now available as an iPad application. An iPhone version of the app has been available since 2009. Diigo users can ...

Another, more experimental initiative, will turn Google into a collaborative space where users can annotate web pages with their own notes, which are browsable by anyone else on the web.