Flick Launcher
Flick Launcher is a launcher application for Android that allows you to assign your favorite commands to the HOME button. This way, whenever you flick the button your application list will appear and you can instantly launch your applications on any screen without having to return to your HOME screen.
In the settings menu you can find tons of options to customize the interface, from changing colors to personalising widgets or the look of the search bar, even integrating Google Now! You can also change the number of apps per column, organise them alphabetically or try a new kind of dock structure.
Like Nova Launcher, Flick Launcher is a worthy Pixel Launcher alternative and brings tons of extra features: app shortcuts, adaptive icons, icon pack support, individual icon customization (size, shape, color and font) and gestures including one-finger swipes on top, bottom, left or right. It also lets you hide apps, customize the search-bar in the dock and has a fingerprint app lock!
Another interesting option is the possibility to register different actions for each app, allowing you to execute them by simply clicking on the HOME button. This way, you can have quick access to the most used applications and not need to go back to the home screen every time you want to open them! To do this, just tap on the desired application and select the action you want from the list that appears. Using this feature is quite simple, it's just a matter of learning what each command means.