FriendFeed Read Later provides you with a ‘later’ button that you can use to save entries on FriendFeed for reading later. You can view these saved entries on a ‘Read Later’ tab on your FriendFeed page. Considering the noise level at FriendFeed, this might just come as a rescue for many.
Instapaper provides a bookmarklet for saving sites for later reading. You can view your saved site links on your computer browser or on your iPhone. Instapaper is a no frill tool and the bookmarklet is a breeze to use. It also provides you with an offline viewing feature and an RSS for your saved urls.
LaterLoop is just like Instapaper, perhaps the only difference being that LaterLoop provides you with a Firefox and Internet Explorer addon, in addition to the bookmarklet, which allows you to save links with keyboard shortcuts. There are RSS feeds for your saved urls, offline reading support, iPhone viewing, and you can link up your Google account to register with LaterLoop.
LaterThis is like a carbon copy of Delicious, starting from the look and feel to the functionality. It provides you with a simple page where you can view the sites you have saved for reading later. You can tag and add comments on each site and there is an RSS feed for your links as well. Just like Delicious, there is a list of popular and latest LaterThis links.
ListMixer provides you with another webpage where you can save your throwaway links for 30 days, after which ListMixer will delete them for you. You can use the ListMixer bookmarklet for Firefox, Safari, and Internet Explorer to bookmark sites, with aditional options of adding descriptions and tags. There is also an RSS feed and a linkroll that you might want to use in your blog.