Hi Jovany,
Thanks for considering our plugins and apologies for the late response!
What you see at wpshindig.com is indeed a basic WordPress site with a number of our plugins installed, including:
Event Tickets is also running there, but if it is the calendar itself you are interested in then all you need is the first of those plugins – The Events Calendar – which is also free 🙂
Our other plugins add additional capabilities and features on top of this.
Let me know if you have any further questions!