The MusicBrainz Python Library by MusicBrainz is a client library for developers to get easier access to the MusicBrainz database using the XML web service. The MusicBrainz database contains a huge amount of music metadata, which is maintained by the MusicBrainz community.
Firebase, real-time backend for web application development, originally launched a little over a year ago. Since its launch, Firebase has remained in beta while it continued to improve its service and build a customer base. Over the past year, Firebase has added features, functionality, and thousands of customers. Accordingly, Firebase has announced it is leaving its beta stages behind and publically launching as a full-fledged paid product.