Telephony and voice APIs are one of the most active segments of the API and mashup world. For example, in the past week, two of the latest mashups in our directory use telephony APIs in innovative ways (the directory has 42 telephony-related APIs):
SoundHound's Hound app allows users to ask complex questions and get an accurate answer really fast. The app combines voice recognition and language understanding functionality to achieve this. The Houndify API allows developers to integrate it in to their own apps and hardware creations.
TiKL, maker of mobile apps Talkray and Touch to Talk, has announced the Talkray API that allows developers to integrate Talkray functionality with third party apps and platforms. The Talkray API enables one on one or group chat, group calls, push notifications, file transfer, and more in a cloud based platform. Although the API can integrate with a wide variety of apps, TiKL expects the largest group of adopters to come from the gaming industry. Accordingly, the API was announced at this year's Game Developers Conference.