Problem: You have multiple blogs hosted on different blogging platforms and you are looking for easy ways to post or publish the same blog post on all these blogs at once.
Solution: There are several options/workarounds, but my favorite is Blog It! – this blog editor is available as a Facebook app and allows you to send the same post to multiple blogs at once.
First you link all your different blog accounts with Blog It! then check those where you want to post this particle message. The blog editor only supports plain text, but it can correctly parse all included HTML tags.
And although Blog It! is a product of TypePad, it works on all popular blogging platforms like Tumblr, Blogger, WordPress.com, self-hosted WordPress, Movable Type and LiveJournal.
Next good option is Ping.fm – It supports almost all blogging/micro-blogging platforms and allows you to post blog posts from almost anywhere including instant messengers, cell phones, FaceBook , email or the standard web editor.
The Ping.fm service is more suitable for micro-blogs that post short posts with a link or two, as Ping.fm does not include any formatting options and all links included in the post are automatically converted to short URLs. Ping.fm supports Flickr and MySpace.
Write To My Blog is a web-based blog editor that lets you compose and publish the same blog entry to three different blog services simultaneously. It supports Blogger, WordPress and all other engines that implement the MetaWeblog API.
You can use the service without registration, but in this case you will need to add the blog details each time you publish a new blog post.
My next recommendation is either Windows Live Writer or ScribeFire for Firefox. These are now full featured blog editors with image upload capabilities and a WYSIWYG interface and support all blogging platforms but do not allow you to post the same post to multiple blogs at once.
In this case, the workaround is to compose a post, post it to blog A, change the current blog from A to B, repost the same post, and so on. It’s a little fiddly, but you get a more user-friendly blog editor, and there’s support for more platforms, including Drupal, Windows Live Spaces, Xanga, and more.
Related: Desktop blogging clients for Linux