JustBlogIt allows you to easily  right-click post to a weblog. You can you use custom settings and add any weblog. JustBlogIt supports Blogger, Drupal, LiveJournal, Movable Type, Radio Userland, TextPattern, TypePad, WordPress, journalspace, b2evolution and BLOG:CMS. And you can add any weblog type you want through the Custom… setting. JustBlogIt supports seamless posting from within many web-based News Readers. JustBlogIt checks to see if you are trying to post from a News Reader and adapts the blogging data accordingly. JustBlogIt also recognizes Bloglines, Rojo, Radio Userland and Amphetadesk news readers.

You can get the latest version (beta) here or the stable release here.