Remuco is a duplex remote control system for Linux media players and mobile devices equipped with Bluetooth or WiFi. With Remuco, you can remotely control your favorite media player. You can switch to the next, previous, or any other media within the current playlist, browse your media library and activate other playlists, rate your media, adjust volume, and more. On the mobile device (the remote control), it displays information about the current media, including cover art.
The libfreespace library enables rapid development of motion control applications for in-air remote controls and mice that embed Hillcrest Labs' Freespace technology. libfreespace provides access to calibrated acceleration, rotational velocity measurements, and sensor orientation. Advanced uses include statistics collection, configuration, and firmware upgrades.
oscremoted is a daemon that listens for OSC events and runs commands in response to them. This allows you to build really general remote controls for Unix-like machines. OSC is an open standard for controlling audio equipment (similar to MIDI over the network). Tools exist to make arbitrary OSC GUIs to send button press events over the network.