LpDBMonitor - a light-weight Oracle database monitor. Show database sessions and related information. Also it allow start/stop tracing or disconnect session. Download version 1.0.0 from here.
LpSplitter - this tool was designed for splitting trace-file on some parts. Download version 1.0.0 from here.
LpCombiner - this tool was designed for extracting session data from one or more trace-files. Download version 1.0.0 from here.
Develop own tools:
UserTool - sample of tool. Download version 1.0.0 from here.