1. App Lock
Rated at 4.5
Description: App Protector (App Lock) is one of the best app lock tools which could protect your privacy. It can lock Contacts, SMS, Gmail, Facebook, Gallery, Market, Settings, Calls and any other apps with password or pattern lock.
I have a full lock on my phone, so if I loose it no one can access my email and by default client information. I find it annoying to have to unlock every 2 minutes in order to check an email or text message. By utilizing this app I can lock everything down, or add additional protection to things like my email, kindle or other things that I want extra security on.