Aconica has released the Max for Live plugin, FIRE SCENE AT SET TIME, a simple timer plugin. It enables you to program specific times at which scenes in Ableton Live are triggered. They say that this is especially useful when scenes at intervals of a few hours should start automatically such as in a generative sound installation.
To be able to use this plugin, you need Ableton Live and Max for Live pre-installed.
Pricing and Availability:
Using Chains and automation to switch keyboard setups