If you think $4.00 is too rich for your blood for an alternative keyboard, this post is for you (if you live in the United States, anyway) – SwiftKey X is now free for an entire day. That should be more than enough time to pick up what many consider the absolute best keyboard available for Android. And maybe even for all platforms. If you can’t seem to get to your phone at the moment, just stop by Amazon’s site and click “Get This App” to ensure you “purchase” it for free download later. [Amazon]