	Title / Link	Description
1	N8FQ narrowband digital radio board	A useful discussion board for digital signals, where you can set up skeds, provide signal reports, announce test transmissions, generally chat, etc. There are several other discussion boards as well, selectable from the same site
2	Reverse Beacon Network	The Reverse Beacon Network is a network of stations listening to the bands and reporting what stations they hear, when and how well. The RBN has a database of past "spots". You can instantly find out what stations, from a given country or zone, have been heard, at what times and on what frequencies. You can see when you've been spotted, who spotted you, and how loud you were
3	DX Watch	One of many DX Cluster sites, where you can report on signals heard/worked
4	HamSpots	User reports on digital signals, easily selectable by band or mode
5	DXmaps	Nice map presentation of signal paths
6	WSPRnet	Signal paths and reports for WSPR
7	HFlink	Signal reports and maps for the global ALE high frequency network
8	PSK Automatic Propagation Reporter	Automatically gathers reception records of PSK activity and then make those records available in near realtime. PSKreporter clients are built in to DM780 (part of Ham Radio DeLuxe) and fldigi
9	WebSDR	WebSDR is a worldwide collection of around 160 SDR receivers connected to the internet