UPDATE 21/09/2015 : For the new version of TrcExTprof click here.
There is already many great free trace file profiler that you can find like tkprof ,Trace Analyzer ,tvdxtat , parsetrc and OraSRP for a description of some of them here http://carlos-sierra.net/2013/02/26/about-tkprof-trace-analyzer-and-method-r-profiler/.So why another profiler ?