TaskForest
A simple, expressive, open-source, text-file-based Job Scheduler with console, HTTP, and RESTful API interfaces.
About
  1. TaskForest - An Executive Summary
  2. A Quick Introduction to Job Schedulers
  3. TaskForest Design Philosophy
  4. Why Text Files are a Good Idea
  5. Comparing TaskForest to cron
  6. TaskForest Licensing and Pricing
  7. Commercial TaskForest Support
  8. System Requirements

Comparing TaskForest to cron

Cron is a very powerful tool, but lacks some important features that most job schedulers perform: It's not easy to specify complex dependencies between jobs. It's also not possible to use cron to rerun jobs or mark jobs as having succeeded so that dependent jobs may run.