The Atlassian Java SDK by Atlassian is available to interact with the add-ons features of the API, useful for developers who develop applications & administrators who manage team projects. JIRA, Confluence, Stash, and Bamboo are some examples that can be extended with the SDK.
GitHub has announced that its Developer Program is now open to all developers regardless of whether they have a paid or free GitHub account. GitHub has also now divided its Developer Program into three participation levels with each level providing an increasing number of benefits.
Twilio recently announced a developer preview for its new Twilio Sync offering. Twilio Sync maintains a single state synchronization infrastructure in the cloud that third party developers can utilize to introduce real-time synching and collaboration functionality into their apps.