I am active on DRATS for Dekalb ARES and can use DRATS from my ID-51A also.
DRATS software:
http://www.dstarinfo.com/drats.aspx
http://www.dstarinfo.com/Data/Sites/1/media/getting-started-with-d-rats-(ga).pdf
http://www.wx4qz.net/New_Ratflector_List.png
http://www.d-rats.com/download/doc/contrib/D-RATS_and_packet_radio-The_Third_Way.pdf
https://www.qsl.net/nf4rc/2018/DRatsHandout.pdf
https://groups.io/g/d-rats/files/Drat%20Ratflector%20on%20a%20Raspberry%20PI%20v3.pdf
https://groups.io/g/d-rats/files/D-Rats2_Packet_DSTAR_Internet.pdf
https://groups.io/g/d-rats/files/D-RATS_and_TNCs_0.3.3.pdf