I enjoy using my personal data to create cool applications, and one of the richest data sets many people have are their online conversations. Most of mine are through Facebook Messenger.
In the past however there has been no simple way to fetch this data, which prompted me to write a facebook message downloader.
From there you can login with your facebook account and view each of your most recent conversations along with several download format options (TXT, CSV, JSON).
This was made possible by an nodejs module called facebook-chat-api.
From here with the conversations I plan to run some statistics on my conversations, maybe continue work on my me-bot project or maybe something completely different.
Hosted here: https://facebook-download.kaiserapps.com
Source code here: https://github.com/benkaiser/facebook-chat-downloader