Pinder is a Python client library for Campfire, the chat application from 37Signals. Campfire utilizes vanilla XML/JSON over HTTP and returns Account, Rooms, Search, Messages and more. Campfire is like instant messaging, but designed exclusively for groups and allows you to save transcripts, share text, files, and code in real time.
Last year, Yelp introduced its completely new Yelp Fusion API. Since its introduction, Yelp has dedicated most of its resources on the new API, and encouraged developers to migrate to Fusion. Over that time period, Yelp has added new features, fixed bugs, and now signals the end of the legacy API.