There is no better blogging editor than Windows Live Writer. This tool has been around for some years and has been part of the Windows Live suite of programs. With the changes preparing for Windows 8 there is worry among users that this outstanding tool will not be supported in the future.
For now it is available in two versions: for the Windows Live Writer for XP for the old Windows XP and Windows Live Writer 2011 for the current Windows Vista / Windows 7 / and Windows 8 operating system.
For tips and techniques see my blog Live Writer Basics.
The Resources page on that blog provides download links for both versions.