Register your mobile phone number and send messages to Twitter using voice.

YackPack is an Internet-based voice communication tool. Users choose a group of individuals they want to communicate with and then record messages directed to individuals or the group as a whole. Group members have the ability to listen and respond to messages.

Google has joined forces with the popular free phone service GrandCentral and created an enhanced platform, Google Voice. Google Voice is a service that gives you one number for all of your phones and integrates calling features like voicemail, voicemail transcripts, call screening and more.

This mobile app combines two popular features of existing apps. It reads your email aloud to you and let's you reply by voice so you'll never be tempted to drive and text again.