Crowd.fm is an easy-to-use platform created to promote events online. It's been described by its founder Tekin Suleyman as "an amazing platform for getting events listed with a single click." The company provides the Crowd.fm API to provide developers integration options.
Facebook has announced that it will soon upgrade Graph API v2.3 users to v2.4. The automatic upgrade will take place on July 10th as part of Facebook's 2 year deprecation cycle. Significant changes from v2.3 to v2.4 require pre-migration attention from developers to avoid app disruption.