It's strangely named but that concern will likely subside after some brief use: SoundHound's Hound app has left beta and is now available to all. If you're looking for a solid voice assistant app (allowing you to search and perform various other tasks with your voice alone), this should be your ticket.
Hound features a slick, fast, and intuitive interface, and appears to be more intelligent than most if not all apps of its kind with language understanding capabilities that combine with speech recognition as well as context and detail comprehension. The result: you can simply say things naturally and get the result you want instead of worrying about accommodating the app.
Now for the bad news: it's only available in the US. We've heard one report that users from Canada can download it, but it simply forwards your voice requests to Google. In any case, those not in the US may want to try an APK mirror here.