[sebw]

No one mentionned Rundeck: http://rundeck.org/

I've been using it for two years now. This has replaced cron on about 200 nodes.

Not only it does cron, but also helps deploying artefacts (integrated with Jenkins) through simple forms. We now have ops with 0 experience in Linux deploying code.

[radiowave]

+1. Also, I replaced all my nagios event handlers with rundeck jobs, so nagios just calls the rundeck API. I get a full audit trail of when the job ran, with what parameters, how long it took, and its outcome.