Few small form factor (SFF) single board computers :

1. Banana Pi ( website )
   
   
2. BeagleBoard ( website )
   
   
3. CHIP kickstarter project ( website )
   
   
4. Cubietruck ( website )
   
   
5. Hawkboard ( website )
   
   
6. Hummingboard ( website )
   
   
7. Intel NUC ( website )
   
   
8. JaguarBoard ( website )
   
   
9. LattePanda ( website )
   
   
10. Lemon Pi ( website )
    
    
11. Minnowboard ( website )
    
    
12. Odroid ( website )
    
    
13. Omega 2 (IoT) ( website )
    
    
14. Orange Pi ( website )
    
    
15. Pine 64 ( website )
    
    
16. Raspberry Pi 2 ( website )
    
    
17. Raspberry Pi 3, Feb 29, 2016 ( website )
    
    
18. UP ( up-board.org , up-community.org , up-shop.org )
    See also Aaeon and this kickstarter webpage
    UP vs Minnowboard processor (?) comparison Intel-Atom-x5-x5-Z8300 vs Intel-Atom-E3825