EEM is flexible system designed to customize IOS : Embedded Event Manager

I'm in a presentation discussing this software, looks like the Cisco IOS platform now has a scripting language with CRON type scheduling.

Cisco Systems: Embedded Event Manager (EEM) Scripting Community

Automate tasks, perform minor enhancements and create workarounds. Develop and run scripts in your own environment, program your own custom actions using Tcl and share your scripts with others by uploading them here. Download examples and useful scripts submitted by others for customization and use in your environment