A fairly simple webhook service that listens to a signald socket and exposes messages via HTTP. Uses YAML for its config files. Can also send messages (replies?) using one or more template files as a basis.
A simple (rule-based) bot library for Signal Private Messenger in Python. Please note that this library is unofficial, unapproved and not nearly as secure as the real Signal clients. Has a bunch of example bots to use as reference material for your own.
A somewhat primitive and not fully developed bot framework for interfacing with signald.
A Python library for communicating with the Signal messaging application via signald.