DJ-Email-Publish - Once you publish on your WordPress blog, this sends the post as an email to your other blogs such as MSN Spaces.
Live Space Sync - Allows you to import all your posts to your Microsoft Live Spaces so you can advertise your blog to your contacts.
LiveJournal Crossposter - Automatically posts your latest entries to your LiveJournal account, or any other LJ software based site.
Vox Crossposter - Makes it so your posts also appear on your Vox account.
Xanga Crosspost - Allows you to have your posts appear on your Xanga account also.
RSS Feed Tools
Â©Feed - Adds copyright info to your feed and puts a digital fingerprint on it so you can search the web for content theft.
Add to Any Subscribe Button - Allows your readers to subscribe via just about any reader out there.
AddThis Sidebar Widget - Adds RSS info and social bookmarking to the sidebar.
Better Feed - Adds a â€œread moreâ€ button, a copyright notice, and a â€œAdd to del.icio.usâ€ link.
DeCat - Allows you to select certain categories to not be included in your feeds.
Feed Control - Gives you the ability to exclude posts from your feed, add pages and much more.
Feed Footer - Adds copyright and advertising to your RSS posts.
Feed Master - Assigns a number to your feed readers so you get a better idea of stats specific to them.
Feed Styler - Allows you to style your feed.
FeedBurner FeedSmith - Make sure all your RSS feed subscribers get counted along with the ones signed up via FeedBurner.
FeedStats - Gives you statistical data on your feeds.
Feedvertizer - Add text links to the end of your feed posts.
RSS Flashfeeder to Myspace - Feeds your last two posts to your MySpace page.
Slash Comments - Adds info to your feed about how many comments are on the post.
Subscribe-Remind - Adds a little reminder to the end of each post reminding readers to subscribe to your feed.
Digg Button - Allows you to add the Digg button anywhere in a post with just a simple code snippet.
Digg IT - Another plugin allowing inclusion of the Digg button.
JPF Add to Reddit - Allows readers to submit your posts to Reddit, if they are already logged in, it automatically posts the title and URL.
Share This - Adds multiple social bookmarking links and an e-mail-this function in one handy button.
Sociable - Adds the linking information for 61 social bookmarking sites.
Social Bookmark Buttons - Adds social bookmark buttons for Digg.com, Netscape.com, Reddit.com, Del.icio.us, Stumbleupon.com, Google.com, Socialogs.com, and Socialposter.com.
Social Bookmarks Plugin for WordPress - Gives you access to the social bookmarking icons.
Socializer Plugin - Adds the ability to post to nearly 40 social bookmarking sites.
SocialList - Lets you see which of your posts have been submitted to del.icio.us and Digg.
Socialogs.com - Allows you to have your entries submitted to Socialogs.com.
WP-Notable - Adds the icons for numerous social bookmarking sites to each post.
wphotspots - Tracks the activity of your posts on several social bookmarking sites. (via)