groovyPost reader, Mike, asks:
Hi Mike. This problem is rather specific to certain Android phones and is determined by the UI that the phone is running. It seems both stock HTC and Samsung offer the ability to hide apps from being visible in the app drawer. There are also some custom launchers that allow it, such as Launcher Pro.
In the cases for for either of the stock launchers of those brands, the hide function can be found by opening the app drawer and then pressing the menu button. There should be an Edit option that lets you change whether or not an app is hidden, and provide a list of hidden apps.
If you are using Launcher Pro, it's slightly different. From the Homescreen (or app drawer) press the menu button and browse to:
You should be able to un-hide the apps from there. Screenshots can be found in this Launcher Pro support article.
Let me know if that solves your problem! Thanks Mike.