Brahmins:

1. Chitpavan and http://www.kokanastha.com/
2. Goud Saraswat Brahmin or Saraswat Brahmin
3. Chitrapur Saraswat Brahmin
4. Rajapur Saraswat Brahmins
5. Daivadnya Brahmin or Daivadnya
6. Kudal Goud Brahmans
7. Deshastha Brahmans

Other Castes or Communities:

1. Maratha
2. Kunbi
3. Agri (people)
4. Dhangar
5. Siddis
6. Konkani Muslims
7. Goan Christhan
8. Chandraseniya Kayastha Prabhu
9. Dhobi, Rajak, Madval (including Christian Dhobies)
10. Gawda
11. Gosavi
12. Kalaikar
13. Koli, Kharvi (including Christian Kharvi)
14. Kumbhar
15. Mahar (excluding those who are already included in SC list) or Dalit
16. Nathjogi
17. Nhavi, Nai, Nabhik, Napit, Mahalo
18. Pagui
19. Shimpi
20. Teli
21. Velip

Reference of all above : http://en.wikipedia.org/