Yaesu Fusion https://systemfusion.yaesu.com/what-is-system-fusion/
D-Star http://www.icomcanada.com/dstar/
BrandMeister https://wiki.brandmeister.network/index.php/Main_Page
DMR http://www.va3xpr.net/faq/
RTL-SDR https://www.rtl-sdr.com/tag/signal-identification/
SIGID Wiki https://www.sigidwiki.com/wiki/Database
SharkRF Openspot https://www.sharkrf.com/products/openspot/
Micro-Node http://micro-node.com/
VA2PV Website http://www.va2pv.com/ and his YouTube Channel https://www.youtube.com/watch?v=8bufLkTMry0