Main features :
Loggers, Hierarchy, Filters, Appenders, Layouts

Appenders:
AsyncAppender, SocketAppender, SocketHubAappender, TelnetAppender, NTEventLogAppender, ConsoleAppender, FileAppender, RollingFileAppender

Layouts:
TTCCLayout, HTMLLayout, PatternLayout, SimpleLayout, XMLLayout

Configurators:
DOMConfigurator