The links below provide only KEY information or sites that are useful to nearly all hams
QRZ is a free comprehensive web site containing a wide variety of tools useful to every ham. Every US ham has a prospective web site derived from FCC records. After registering you can personize the page. Other features include news, forums, swapmeet (buy/sell) and practice exams.
Club Log is a free (donation requested) online database with a suite of powerful tools supporting active DXers worldwide. Once registered you generate personal reports, showing which DXCC countries you have worked and/or confirmed, when you first worked them, which ones you still need, and which are the most likely to QSL. Clublog has 866.5 million log entries, 62,059 users and 97,114 callsigns.
Free simple marketplace web site for buying, selling and trading everything ham radio. Postings are organized by category. Registration required to post ad.
SCHAMSWAP is dedicated to local amateur radio operators who are primarily interested in buying and selling amateur radio equipment but discussions of other subjects of interest (Antennas, DX, Contesting, etc) are encouraged as well. This group is based in the Columbia, South Carolina area and membership is restricted to SC and border cities (Augusta, Charlotte, etc). YOU MUST BE A LICENSED AMATEUR RADIO OPERATOR LIVING IN THE ABOVE AREAS. YOU MUST INCLUDE YOUR CALL AND HOME CITY WHEN APPLYING FOR MEMBERSHIP.
If you are a Twitter member, QRZ NOW is an excellent feed to follow providing amateur radio announcements & news. If not on Twitter, here is their web site. https://qrznow.com
A daily Morse code challenge. You have 21 tries to guess the word, which will be played out loud in Morse code. Playback speed starts at 40 words per minute (WPM), which is pretty fast, but don’t worry! Every three tries, the speed decreases by 5 WPM. You are granted one guess every time you play the word. Play the word again if you need to keep guessing.