JustBlogIt is a nice little Firefox extension (also works with Mozilla) that adds a right-click menu entry to easily add a blog entry for the current page. The unique thing about it is that it also supports many web based news aggregators, such as Bloglines. You simply have to right-click on the entry you wish to blog about, and JustBlogIt will automatically insert the correct title and link in the blog form. This works surprisingly well. Nice!