DSTAR
I am active on the DSTAR digital voice mode.
http://www.dstarinfo.com/home.aspx
https://gaauxcomm.org/dstar-net/
https://www.repeaterbook.com/repeaters/feature_search.php?state_id=13&type=D-Star
https://www.dstarusers.org/lastheard.php
https://www.jfindu.net/dstarlh.aspx?rptr=WX4GPB+C
https://sites.google.com/site/wa4asirepeater/home
http://tmrahamradio.org/D-STAR_for_Dummies_v4.pdf
http://www.roblocher.com/whitepapers/dstar.html
http://www.hoodarc.org/getting-started-with-d-star.html
https://relais-hb9f.ch/relais/dstar/pdf/dstar_spezifikation.pdf
https://www.icomjapan.com/explore/d-star/
https://www.la1b.no/wp-content/uploads/2016/12/Newbies-Guide-to-D-Star-V2.0.pdf
https://www.sbara.org/downloads/DSTAR/D-STAR_101_Basic_Setup_And_Operation.pdf
https://amateurradionotes.com/d-star-2.htm
https://nj6n.com/dstar/dstar_chat.html
https://stnydmr.net/calendar/dstar/