&amp;lt;a href=&amp;quot;http://healthtap.com&amp;quot; target=&amp;quot;_blank&amp;quot;&amp;gt;HealthTap&amp;lt;/a&amp;gt;: (free, healthtap.com) HealthTap is a mobile health care Q&amp;amp;amp;A station. Users can write and submit their own questions and then get an answer from a real-life doctor -- who is required to show proof of a valid medical license to register. (iPhone, iPod Touch, iPhone, Android)