This is a good Android app to have to launch apps, set remainders, alarms, update statuses in Facebook, Twitter etc. Google Now should have these features but for now they don't, till then apps like Assistant and EVA are good ones to have.
Speaktoit Assistant is a virtual buddy for your Android device that uses natural language technology to answer questions, find information, launch apps and connect you with various web services, such as Google, Facebook, Twitter, Foursquare, Evernote, and many others.
The Assistant works with your smartphone to get maps, search for news and images, look up weather reports, convert currency and measurements, send email, and much more.
No need to memorize special commands or complex interfaces - simply speak or type in everyday language and the Assistant will understand and respond with what you need.
You can also choose assistant's appearance whether it be pretty blonde or brunette girl, handsome agent or old professor.
You can try it here https://market.android.com/details?id=com.speaktoit.assistant