Tiny Flashlight + LED - Tiny Flashlight + LED is free to use application that can be used anywhere else, having nicely built-in functionality.
eero - Blanket your home in fast, reliable WiFi
Hmu - Hmu is a social app by SC Friends that enables users to search for new friends by viewing a list of users from all around the globe and tap on the desired profile to engage in live chat with them.
Plume - App for writing documents, scripts, books and more.
Flashlight - Control your Mac with a keystroke.
MIWIFI by Xiaomi - Wifi router beta with a twist: you build it yourself