I've recently tried out ~30 different Voice Applications from Windows Phone 8 market place. There's a very brief summary of the App and my opinion of the quality. Also I've noted the provider of the speech technology, but note that in most cases the UI and experience are the responsibility of the app developer not the speech technology provider. There are many worthy efforts here while some simply didn't work at all when I tried them. Take a look yourself and decide what you like. A noteworthy capability that Windows Phone 8 has introduced is the concept of deep linking. Although only a handful if the apps take advantage of this it gives third parties the opportunity to make a direct link to their application by registering a keyword with Windows Phone that allows you access the app functionality as though it were native to Windows Phone. This is way cool because when properly used it creates a natural connection between the brand name and the capabilities of the application and the brand.
I've divided applications into into 7 broad categories, Assistants, Command and Control, Dictation, Games, General, Search and Translation. Note that I didn't specifically review the built in voice capabilities of Windows Phone 8 that include Voice Activated Dialing, Voice to SMS, E-mail composition and Application launching as well as the speech API used by eight of these apps.
Assistants : These applications aspire to do everything for the user. The problem is that they over reach and fall short (it's really hard to be good at everything). Worse, you won't be able to recall everthing the assistant is good at so you'll restrict your usage to a few simple things assuming that you even keep using the assistant.
Alex : (MS - Deeplink, + ?)
Ask Ziggy: (Nuance)
Command and Control: These applications do something for the user. Each of these apps uses the Win-RT speech API. Their biggest weakness is that their grammars are not robust and the users may have difficulty remembering what the app can do. Some of these have deep links which means you can launch them directly with the long press on the Windows button.
Battery Monitor w/ Voice Control: (MS – Deep link)
Hey DJ: (MS – Deep link) YY Top Pick!
Tivo Command: (MS)
ReadyClick : (MS - Deeplink) Y Top Pick!
Toggle: (MS – Deep link)
Dictation: These apps focus on voice to text input for the phone. Most have verbal punctuation. Some have connections to mail, messaging and status update. Sometimes the voice service provider is not identified. Biggest weakness is lack of integration with text input scenarios. None have correction interfaces but that doesn't seem to be a big miss.
Dictation Station: (Nuance)
Voice Assistant: (?)
Speak it : (?)
Copy This : (MS - Deep Link) YTop Pick! (new as of Jan 10, 2012)
Dictate Now : (MS - Deep link)
Games - entertainment!
Calculate this! (MS)
Kung Fu Stonie: (Could be home brew)
General: Grab bag category
Concept Mapper: (?)
GPS Voice Navigation: (?)
Voice Chat: (Nuance)
Voice Toddler Cards: (?)
Voice Agenda (MS w/ deep link)
Search: These are specialized search or Q/A applications.
Bingo Voice: (?)
Urbanspoon: (MS – Deeplink) Y Top Pick!
Voice Answer: (Nuance)
OpenBeer: (MS - deeplink)
Translation: These apps help you communicate in another language. Many of them are powered by Nuance’s cloud service SR. Many of the apps have a freemium approach thatgives away some free access but ask you to pay if you are a heavy user
Translator: (MS - Speech Server)
Voice Translator: (?)