Source Code of the Postview
The Postview source code is freely available and is licensed under the MIT-License. The Postview team maintains the source in a Git respository. The official repository is hosted on GitHub. You can use Git to clone the source code to a location of your choosing using:
git clone git://github.com/hallison/postview.git postview
No GitHub account is required to clone the source code. You can also download a bundled zip file of the current source code as well as previous versions. In the unlikely event that GitHub is unavailable you can try a mirror repository.
New features and patches are welcome.