Publishing
The ZeroInstall.Publish namespace provides utilities for creating and modifying feed files. This provides the basis for the Zero Install Publishing Tools. You can also use it to create your own tools.
Feed signing
The SignedFeed class provides a wrapper around Feed that adds OpenPGP signatures to feed files when saving.
Set missing values
The .SetMissing() extension method for Implementation sets missing properties by downloading, extracting and hashing files as needed.
Feed editing
The FeedEditing class is a container for editing feeds with an Undo system.