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HF Antennas 101 - Here are 10 tips and truisms that every ham should know about antennas, by W20QI

LogView - LogView is a FREE post-contest log-visualisation tool, for analysing contest performance. It plots the QSOs in a Cabrillo-format contest-log on to one of 8 different maps by finding the position of each QSO from an online database of about 970,000 W/VE callsigns.

YV Venezuela Callsign Search - Online YV and YY Callsign search.

U.S. Amateur Radio callsign lookups by UALR - US callsign database is updated daily and is derived from FCC license data provided by University of Arkansas at Little Rock

QSL Buro Finder - Windows, Linux and macosx freeware that help QSL sorting by returing correct QSL buro looking up for callsigns bY IK4ZIN in italian

Associazione Radioamatoriale Sardinia QRP Club - First QRP Club in Sardinia Island (IS-QRP). Special Callsign IQ0QP

MX0GGP - ANARC - Angel of the North Amateur Radio Club based in Gateshead, Tyne and Wear - Club callsign - MX0GGP

Florence Amateur Radio Club - supports three repeaters in the Florence SC area. The Club Callsign, W4ULH authorized by the Federal Communications Commission.

D-STAR Callsign Calculator - This is a user-friendly web page based D-STAR call sign calculator that requires no installation or configuration to use.

M0RSE - A special callsign to celebrate Morse Code

HamStationUltra - The HamStationUltra package for Windows is designed specifically for the Kenwood TS-2000, Yaesu FT-2000 and Ten-Tec Jupiter/Pegasus transceivers.

K7BON - Callsigns in Oak - Your call sign, name or specialty item professionally crafted in oak (two thicknesses available), from a computer designed pattern and finished in up to 4 coats of Formby's Glossy Tung Oil.

Yourcallsign.com - Web Hosting & Domain Name Registrations managed by Scott Neader, QTH.COM

International SWL-Registry - Easily obtain a free and unique International SWL Callsign and, if you wish, be added to the Worldwide Online SWL Directory. Official certificates are also available.

Amateur Radio Call Log - Amateur Radio Call Log is a basic ham radio logging app for Android 1.5 and above. It stores Date, Time, Station, Freq, Mode, RST, and additional comments. Also has the ability to easily look-up callsign information from the FCC database.

Ham - Open Source Ham Radio App for Android. Solar / calculated band conditions & Callsign lookups via QRZ.com XML subscription.

Amateur Radio Callsign DB - Ham Radio Android app, quickly and easily lookup license data for U.S. amateur radio callsigns

BeSpeak - BeSpeak is a real time HF beacon announcer. You select a band and the screen shows location, callsign and status of the beacon transmitting at that time.

ALL2DTA - Win32 command line utility, that allows you to create Master Callsign Database file (DTA), used in many contesting programs, from different logs in ADIF, Cabrillo, and plain text formats.

MixW - Online QRZ.com Lookup dll - This add-in for MixW will automatically do a callsign lookup from qrz.com and fill select information into your MixW log entry. It also optionally checks to see if the station is a known LoTW user

CTR-Remote - CTR-Remote is an enhanced version of CTR817 (a Pocket PC radio control program for the Yaesu FT-817). The program has been completely re-written using Microsoft Visual Studio .NET and now supports a wider range of radios, Bluetooth® wireless technology and/or TCP/IP and Wi-Fi radio control, ADIF log import and export format, custom frequency lists, DX Cluster monitoring, callsign lookup, and enhanced scanning options.

HamTime - Announce your callsign at least once every ten minutes. HamTime runs in the corner of the screen and gives you an audible alarm when that announcement is due.

iPhone Ham Radio Callsign Lookup - This webapp provides an iPhone-compatible lookup of Amateur Radio Callsigns. It provides the name, address, and license class (from the FCC’s public records) of any US-Licensed Amateur Radio Operator.

Ham for iPhone - Ham is a free iPhone Ham Radio utility. View solar conditions (Solar Flux, Indices, X-Rays, Sunspots and calculated band conditions). View PSKreporter reports and Callsign lookups.

QSL.FM for iPhone - Simply visit QSL.FM from your mobile browser, and you'll be redirected automatically to a crisp, fast, and useful callsign and repeater search tool!