While Linux mobile shells are still in a very early stage, touch-optimized app launchers can significantly improve the overall user experience on touchscreen devices while using less memory than a full shell. Some of these close automatically each time an app is launched, so associating them with a particular hardware key on the mobile device might work.
There are several simple Linux launchers available,
but none are officially packaged yet:
== GTK ==
* [https://wiki.lxde.org/en/LXLauncher lxlauncher] (LXDE official launcher, gtk2; [https://wiki.lxde.org/en/images/5/5c/LXlauncher.png screenshot])
* [https://github.com/ikeydoherty/columbiad columbiad] (minimal gtk3 fullscreen launcher; [https://www.youtube.com/watch?v=2toCoeoqoag video demo])
== Qt ==