Google's Android 4.1 Voice Search can do a lot of stuff related to sports. If you want scores or info on recent or upcoming games, you're in luck:
Ask your device "When's the next Cubs game?" and it'll show you a graphic with the answer while audibly telling you the details.
Ask "What was the score of the Cardinals game last night?" and you'll see and hear the stats.
Ask "Did the Marlins win their last game?" and you'll get a visual answer along with a spoken one.
Voice Search will always give you an option to learn more, too: The sports graphics have links to jump straight to game recaps and highlights. With any Voice Search command, you can also scroll down past the organized answer to see a list of standard Web search results.
This one's been around in Android for a while, but it's still a winner: When you have a hankering to hear some specific tunes, just tap your device's microphone key and tell your phone or tablet what it is you desire.
You could use a band name -- "Listen to The Beatles" -- or you could request a specific song: "Listen to 'I Am the Walrus.'"
Whatever you say, Voice Search will pop up a list of places where the music could be played -- the default Play Music app along with YouTube and third-party programs like Pandora -- and let you pick the one you want to use.
Another oldie-but-goodie is Google's voice-powered message sending functionality. It can work in several different ways. You can send a text to someone by saying "Send text to" followed by the person's name and the message you want to send. Voice Search will pull up a card with the person's name and photo along with the contents of the message you composed; you can edit the message or tap once to confirm it's correct.
You can send an email to someone using a similar setup: Just say "Send email to" followed by the person's name and your message. If you want to get fancy, you can use the phrases "subject" and "body" to fill out the entire email (e.g. "Send text to Mom, subject 'Hello,' body 'How are you today?'").
Want to make a note to yourself? No problem: Say "Note to self" and then whatever it is that you want to remember. Voice Search will compose an email to you, using the default Gmail account on your device, with both transcribed text of your message and an audio attachment of your voice.