Here is app which let you find your mobile apps easily-
QUAD DRAWER , QUICK APP DRAWER
SHORT DESCRIPTION-
Quad Drawer is the quickest way to launch apps. It’s a simple app drawer: using the predictive keyboard, just type a few letters of the app you’re looking for and Quad will bring it to you.
You want to go quicker? You don’t want to return to your homescreen to launch your app drawer? We solved that! Go to your settings, and activate “Floating window”. Now, you can access Quad Drawer from any app by touching the floating icon.