The Intamsys Funmat line of Industrial 3D Printers are based on standard Reprap/Marlin/Sprinter firmware, and are therefore compatible with an array of 3D Gcode slicing software.
Simplify3D continues to prove itself as one of the best slicer engines on the market -- as one of the few premium (paid) slicers, it has certain features that make it better for many parts, whether that be the multi-process capabilities, or simply the way it decides to make the toolpath for different geometry, we love, and generally opt for using S3D.
Cura has come quite far since the early days, now rivaling S3D for the crown of 3D slicers. With many experimental features, along with massive support from the community, Cura is a world-class slicer, and best of all, it's completely free. Cura is a great option when you're a bit more advanced with your prints.
INTAMSUITE is the slicing software designed to work seamlessly and efficiently with INTAMSYS 3D Printers. Based on the award-winning CURA platform, it comes with presets for PEEK, ULTEM, PPSU and other thermoplastics specifically designed for the Funmat line of 3D Printers. Basically, you're getting an older version of Cura with everything pre-set; for general use, if you're a beginner, this is the way to go.