Here is a list of features the free F. FLW version offers:
* Super fast with a small CSS footprint and defer loading Javascript files
* Fully responsive
* ACL everywhere also who can view the content of events
* Nested calendars
* Ajax powered calendar with a smooth design
* Google and OpenStreetMap map integration
* Batch editing of events
* History tracking per event
* Joomla tags support
* Coloring individual events
* Upcoming events module
* Content plugin
* Counter module
* Mini module
* Downloading events to google calendar and Outlook
* Search plugin
* Native joomla language support
* SEO optimized with rich snippets (structured data)
* Drag'n Drop and resize in the frontend
* Template override support
* Multiple locations per event
* Layout and template override support
* Attachment support trough DPAttachments
* Custom Fields support with Joomla custom fields
* Privacy suite support with action log and and data requests