jLog is a modern Freeware Ham Log program that can run on all major platforms, e.g. Mac OS X, Mac OS, Linux/Unix, Windows, etc. It offers a nice, clean interface and allows efficient entry of QSOs.
Import or Export of data using the standardized ADIF 2 format is possible to easily exchange data with any other decent Log program.
Built-in CW Keyer, CAT control for many popular, rigs, DX Cluster tracking, call lookups