The HasOffers Ruby SDK by Michael Nikitochkin communicates with the API to implement performance marketing solutions in social media applications. Resources include installation, usage, and testing.
Pocket (Formerly known as Read It Later), has just announced the introduction of the Pocket API, allowing developers the ability to easily integrate Pocket into web sites and third party applications.
Mailgun added a slew of new features to its email validation API including target mailbox validation, role-based address check, disposable mailbox, reporting, and rate limits. Additionally, Mailgun added the API under its existing SLA and has transitioned to a tiered, usage-based pricing model.