Log4OM

Log4OM is a free logging software designed for amateur radio operators who require an integrated environment for station management and QSO logging. It is widely used by DXers due to its strong database capabilities and its integration with common online services.

The program uses a structured SQL database and supports large logbooks without noticeable performance degradation. One of its key features is CAT Control, which allows direct communication with many transceivers for automatic frequency and mode detection. The DX Cluster Client provides real-time spotting with filtering and band/mode tracking, helping operators quickly identify new DX opportunities.

Log4OM integrates with several external confirmation systems. Built-in support for Logbook of The World (LoTW) and eQSL allows automatic upload and download of confirmations. The software also includes Award Tracking, enabling operators to monitor progress toward DXCC and other award programs directly from the log.

Additional capabilities include Callbook lookup via services such as QRZ, ADIF import/export, and customizable QSL management for both electronic and paper cards. The interface is modular, with panels that can be arranged depending on operating preferences.

Log4OM does not include integrated digital mode engines, so digital operation normally relies on external programs such as WSJT-X or FLdigi connected through standard interfaces.

Overall, Log4OM provides a comprehensive logging environment suitable for both casual operation and serious DX chasing, with a feature set comparable to many commercial logging applications.