If you are just planning on purchasing shows, you will only need simple software to draw lines. I personally use keynote/powerpoint. There are also downloadable options from the show creators sites.
If you are creating shows, the top two software solutions are Adobe After Effects and Davinci Resolve. Both have pros and cons. Check out our page dedicated to
software.
Ease comes at a price. The easiest way is to check out www.Luxedo.com. They have a full package where you just provide the power and the house. Once you set it up and get your snapshot, you can send the snapshot to a show creator and they will create a show that you can play on your house.