If you are using Windows, BlogJet natively supports Blogware. It is very easy to configure and a nice client (I'm using it to post this message).

If you want to use a blogging client to post entries to your blog that doesn't offer Blogware support, you can use any client which supports the MovableType API. To do this, use the following settings (these were tested using ecto):

• API Type: MovableType
• Endpoint URL: http://www.blogware.com/xmlrpc.cgi
  This my be broken down into server name and URL. If so, use www.blogware.com as the server name and /xmlrpc.cgi as the URL.
• Username: Your Blogware username
• Password: Your Blogware password