The Exact Online Ruby SDK by Exact Online is a gem that allows developers to integrate the Exact Online API's methods into their Ruby applications. Usage examples are included in the documentation. This gem was made with Hoppinger.
One of the more interesting APIs added here recently comes from BT, British Telecom. It's not so much a single API but a set of early beta APIs code-named Web21C, part of their larger £10 billion 21st century network initiative called 21CN, an IP-based, multi-service network.
The need to turn raw data into actionable knowledge is fueling the growth of an ecosystem of young companies aiming to develop solutions that can literally turn data into dollars. One such company is Prelert, which last week released an API for its anomaly detection engine.