Question: what is the best 3d printer slicer?
Answer: Cura. It was developed by the 3D printer giant Ultimaker and used by the company's community of users. ... 
3DPrinterOS. 3DPrinterOS is a cloud-based platform that integrates a slicing app but also other features essential for 3D printing such as a repair app. ... 
IdeaMaker. ... 
KISSlicer. ... 
Repetier-Host. ... 
OctoPrint. ... 
Slic3r. ... 
AstroPrint.