The aim of this app is to provide the user a possibility to fully create their own remote out of several modules.
Note it's no longer in active development, but I still use it to arrange a couple of webviews next to each other in pages, so I may push some updates every few years or so.

Modular Remote is free, and open source. If you want to help by adding support for new remotely control-able devices, read this guide. Some very old to-do list can be found here.