You can directly create blogs by using a desktop client for WordPress, Blogger, Typepad, LiveJournal, Blogger, MovableType, Serendipity, ExpressionEngine, Drupal, Advogato, Atom blog or for any other blog platform. Here is a list of best free, open source desktop blogging applications, tools, software, client, and editors:
1) Thingamablog: Thingamablog is a free desktop blog application where you can create blogs by using FTP. It works in Windows, Mac OS X, and Linux.
2) Deepest Sender: Deepest Sender is a desktop logging client for Mozilla Firefox. You can directly create and update blogs from the toolbar.
3) Windows Live Writer: You can directly create and add blogs by using Windows Live Writer. It works for TypePad, WordPress, and Blogger.
4) Zoundry Raven: Zoundry Raven is an open source blog editor which works in WordPress, Blogger, Movable Type, TypePad, etc.
5) AirPress: AirPress is a free cross-platform desktop client in Adobe AIR for WordPress.
6) Blogdesk: Blogdesk is an open source blogging tool for WordPress, Serendipity, ExpressionEngine, MovableType, and Drupal.
7) Post2blog: Post2blog is a free blog editor which works for WordPress, Typepad, MovableType , etc.
8) Qumana: Qumana is a free blog editor which works in Windows XP, Windows Vista, Mac OSX Tiger, Mac OSX Leopard and Linux.
9) Sharp MT: Sharp MT is an open source blog editor for Movable Type. It works in desktop, SmartPhone, and PocketPC.
10) Bleezer: Bleezer is a free desktop blogging client which works with Windows 2000, Windows XP, OSX 10.3 or higher and Linux.
11) BlogTk: BlogTk is an open source blogging application built on Python and PyGTK.
12) Drivel: Drivel is a free blog editor which works with MovableType, Advogato, LiveJournal, Blogger, and Atom blogs.
13) Gnome blog: Gnome blog is an open source blogging client which works in Linux and Unix.
14) Scribefire: Scribefire is a free blog software fo creating blogs which works in Firefox, Chrome, Opera, and Safari browsers.
15) Kblogger: Kblogger is an open source blogging application K desktop.