nnCron is described as 'advanced and very powerful scheduler, scripting tool and automation manager. nnCron is very small in size (900k), but its capabilities are truly colossal' and is an app in the OS & Utilities category. There are more than 10 alternatives to nnCron for Windows, Linux, Mac, iPhone and AutoHotkey. The best alternative is AutoHotkey, which is both free and Open Source. Other great apps like nnCron are FastKeys (Freemium), Actiona (Free, Open Source), Clavier+ (Free, Open Source) and Quick Macros (Paid).
All in one Windows automation software. Fully configurable text expander, start menu, shortcuts, auto complete and mouse gestures. User-defined commands to run files, open webpages, send macros or automate anything. Incredibly powerful but yet simple to use.
Actiona (formerly known as Actionaz) is a task automation tool. It allows you to create and execute action lists. You don't need to know any programming language to use it: its intuitive interface allows you to create action lists (scripts) using drag & drop.
System Scheduler for Windows, Free Task Scheduling Software replace Microsoft Windows Task Scheduler The free version can schedule applications to run, popup reminders and watch for specific windows and send keypresses.
This program is an "inotify cron" system. It consists of a daemon and a table manipulator. You can use it a similar way as the regular cron. The difference is that the inotify cron handles filesystem events rather than time periods.