The Smoothie was a pioneer of 32 bit controllers and amogst first boards to hit the market.
For a 3D printer are needed complex computations in order to deal with different printer types (Core XY, Delta etc) and multiple extruders.
This is a beautiful designed software and features high code “modularity”
Official board it’s here and we highly encourage to buy it :
http://smoothieware.org/smoothieboard
another implementation it’s :
https://www.panucatt.com/azteeg_X5_mini_reprap_3d_printer_controller_p/ax5mini.htm
Designed boards that are not necessarily available on market :
- Momoinololu
https://itcorp24.cart.fc2.com/ca8/48/p-r8-s/
HAs even a git repo :
https://github.com/iqOyOpi/momoinololu
2. 3DPCB
A project that I have used to make my own board :
https://hackaday.io/project/833-3dpcb-smoothieboard-compatible-driver-pcb
3. Cohesion3D
HAd a nice product and he shared his project also on github
Chinese clones :
If you know about other boards please let me know.