fcron is described as 'Fcron is a periodical command scheduler which aims at replacing Vixie Cron, so it implements most of its functionalities' and is an app in the Office & Productivity category. There are five alternatives to fcron for Linux and Windows. The best alternative is entr, which is both free and Open Source. Other great apps like fcron are System Scheduler (Freemium), Anacron (Free, Open Source), incron (Free, Open Source) and mcron (Free, Open Source).
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.