IBM alphaWorks has some of the coolest software you can try for free.  Here’s a good one….it’s code name was highlighter.

From the page where you can download it, here’s what it is and what it does:

What is IBM Web Highlights?

IBM Web Highlights is a social Web 2.0 application that allows quick creation, sharing, and discussion of Web snippets and Web pages. The snippets are in the form of highlights that can be independently created and then discussed between members of the IBM Web Highlights community and groups.

How does it work?

A highlight is a selected portion of a Web page. Highlights can be manually created using IBM Web Highlights or, when using Firefox and the ffHighlightr extension, by selecting the portion of the page, right-clicking, and selecting the Send to IBM Web Highlights menu option. After highlights are created, they can be shared, tagged, rated, and commented on. Highlights can also be searched for, sorted, and modified by their creators and the entire community. Public highlights are accessible (by view, search, comment, and tag) by the entire community, private highlights by its creator, and group highlights by a subset of the IBM Web Highlights community. Only the highlight creator and system administrator can delete or modify a highlight.