Microsoft has open sourced its blogging application Windows Live Writer, as Open Live Writer:
Open Live Writer is an open source application enabling users to author, edit, and publish blog posts. It is based on a fork of the well-loved but not actively developed Windows Live Writer code. Open Live Writer is provided under a MIT license.
This is what you do when you can’t or won’t support software anymore. Google and Dropbox have a lot to learn about doing the right thing in this regard.