Firm Ware
RepRap
Video
Merlin
Clipper
Duet
Duet Maestro  Clone
Ebay
Duet WIFI
Don't use stealth mode.
Reprap
https://www.gearbest.com/printer-parts/pp_3003615426532584.html?wid=2000001
  • License=CERN OHW License 1.2
  • Single board solution 123x100mm, 2 versions (V0.6: 4 drivers, V0.8.5: 5 drivers)
  • 32 bits SAM3X8E ARM processor, same as in the Arduino Due
  • Integrated stepper drivers A4982 with firmware controlled current, 2A
  • Connector for Duex4 expansion board adding 4 more axes for 5/6 material printing
  • On board SD 2.0 compliant uSD card slot (supports SDHC cards) for autonomous printing
  • Ethernet Port with transfer speed up to 400 kb/s with fast SD-card. Programmable MAC address
  • Integrated web server for control with a browser via Ethernet or control via USB
  • Supports RepRap Firmware features such as IR Z probe, axis compensation, digital current control and multi extruder mixing. DC42 fork support delta, H and CoreXY kinematics.
  • Support touchscreen interface PanelDue
  • Fully Open Source and designed in KiCAD, Open Source EDA software

Smoothie Board
  • License=GPL CERN OHL ( Open Hardware )
  • Single board solution, integrated motor drivers ( with easy external driver connection )
  • Based on LPC1769 ( 120Mhz, 64kB RAM, 512kB ROM ) Cortex-M3 microcontroller
  • A lot of features standard on board, including microSD card, digital current control.
  • Easy file-based configuration ( no compilation, no firmware upload )
  • 2, 4 or 6 Mosfets ( capable of double extrusion ).
  • Integrated well-cooled A5984 stepper drivers, capable of going to their full 2A, 1/32 microstepping (3, 4 or 5 drivers depending board version)
  • USB interface exposing serial and mass storage
  • Design with focus on cost and connectors options
  • Ethernet ( including web interface and network access via Pronterface )
  • Extremely feature-rich
  • Can also control CNC mills and laser cutters
  • Large dedicated community
Raspberry