In Beamer 2.1 scripting support was added, enabling existing remote apps to control Beamer. Here are a few that support Beamer:
The classic remote app that supports many, many apps.
Launch Beamer from Rowmote and play/pause videos or skip to the next or previous movie.
Note: the AirPlay menu in Rowmote controls AirPlay mirroring, not device selection for Beamer.
TodayRemote free, with $2.99 in-app purchase to unlock full version
The quickest way to control OS X media playback remotely, from the Today view in Notification Center.
See what's playing and control Beamer with play/pause and select the previous or next movie.
Unified Remote free, with $3.99 in-app purchase to unlock full version, or $0.99 in-app purchase to add an extra remote
A very feature-filled remote app to control many apps.
With the Beamer remote you can play/pause, control the playback position, select previous or next movie and even open new movies and subtitle files.
(Also available for Android and Windows Phone.)