There are 2 repositories under facebook-messages topic.
This tool can send messages at a large number to a facebook friend or to a facebook chat group.
Simple conversion script for using the new Facebook message archive format with existing tools
Service allow user view their facebook history message.htm
Facebook Messenger bot that uses Translink's API to get data and return it to user.
Simple chat application based on ReactJs, Socket.Io. Using simple-chat-api as back-end
This (for now) console application aims to help with analyzing your messenger conversations.
You can download your facebook messages using this
Make the messages in facebook web chat rounded. Again!
You can read your Facebook messages from your phone using this codes.
You can read your Facebook messages from Email using this codes.
Archive your facebook messages to JSON