Log4j Viewer is an Eclipse plugin which can read various patterns of log4j's log file and show them in a structured table view which filtering, sorting, searching may apply on.
IPLClient is part of a Client-Server technology for IPLocation and visualization. It will manage log-file transfer and handle data delivered by the IPLServer for proper visualization. Modules and plugins may be applied to the client.
SimpleLogViewer is Java 2 based GUI application that display logging data. Can read a file or listen over a TCP socket. Use plugins/embedded scripts to Hide, Rewrite, Colorize lines of log.