AstroPrint
7.4#1 in additive manufacturing softwareFrom $9.90 a monthFree planAndroidiOSWebAPI
VisitAstroPrint suits makers and education users who want to manage printers, files, and print activity. Its free tier is described as suitable for casual users.
SuperSlicer suits 3D-printing users who want detailed control over slicing, calibration, materials, and automated G-code workflows. It is available across Windows, macOS, and Linux.