Google Chrome v27 upgrades Google's voice search capabilities. Now you can have a conversational search with Google, and it can understand a lot of the context involved in your spoken searches. It's a baby step towards the Star Trek computer of the future.
Google has recently introduced a scientific calculator on the results page -- no app needed. To get it, search for "scientific calculator" or a calculation such as "19/74". In Google Chrome, you can even trigger it by searching by voice.
If you search Google using the Google Chrome browser you can speak your queries by clicking on the microphone icon in the search box. (Obviously your PC will need either an internal or external microphone for this to work.)
