The Firebase Ruby Library firebase-ruby contains development information for the Firebase API, written in Ruby. This library provides developers a way to integrate the API with their web applications using Ruby on Rails.
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.
At ProgrammableWeb we've been paying attention to the explosive growth and interest in serverless technologies (E.g. Amazon's Lambda, Google's Google Cloud Functions, and Microsot's Azure Functions). Even Twilio got into the game with its highly specialized serverless offering for Twilio developers.