Judo Payments offers a platform to build complete mobile payment solutions and host applications with a Judo marketplace. The Judo Payments Ruby SDK assists in embedding Judo Payments functionalities into Ruby applications. The API and SDK methods, classes, and functionalities are fully documented on Judo's site. The SDK is compatible Ruby 1.9.3 or later (up to version 2.1.x) and requires a developer API key for use.
Samsung and the Tizen Association recently made the Tizen Software Development Kit for Wearables available from the Tizen developer web site. The SDK supports any wearable running Samsung's Tizen operating system, but that's an extremely limited number of devices at the moment, with just the Samsung Gear 2 and Gear 2 Neo smartwatches filling the space.
Fog Creek Software has announced the release of HyperDev (beta), a platform that developers can use to build web applications and experiment with front-end and back-end code without having to configure servers, run shell commands, compile files, and complete other extraneous tasks.