incron - This program is an "inotify cron" system. It consists of a daemon and a table manipulator.
Kissflow - Kissflow is a workflow tool & business process workflow management software to automate your workflow process. Rated #1 cloud workflow software in Google Apps Marketplace.
fcron - Fcron is a scheduler designed for Unix/Linux systems, especially usefull when your system is not up all the day long.
Process Street - Create beautiful rich process documents in a simple to follow checklist format. Fast, free and incredibly simple to use.
Anacron - Anacron is a periodic command scheduler. It executes commands at intervals specified in days.
Pipefy - Pipefy is a process management software that empowers anyone to create and automate efficient workflows on their own without code.