A full version program for Android, by WiFi Mouse.

WiFi Mouse Pro is a mouse, keyboard, and trackpad for your computer that allows you to control it remotely through a local network connection. It can also play as a media controller for several online video and audio sites, such as YouTube, Vimeo, Soundcloud, Deezer, Spotify, and more. It has a built-in file browser and can play as a remote desktop for your computer, so you can use it as a replacement for the broken mouse and keyboard on your computer.

For this to work, you need to install the mouse server not only on your smartphone but also on your computer. Moreover, ensure that the devices are connected to the same network.