Tracer is graphical tool for visualization and diagnostics of MCMC output. It can read output files from MrBayes and BEAST.
You can download Tracer from here: http://tree.bio.ed.ac.uk/software/tracer/
The Divergence Dating tutorial is available describing how to use Tracer to analyse the output from BEAST.
The recommended citation for this program is:
- Rambaut A, Drummond AJ (2007) Tracer v1.4, Available from http://beast.bio.ed.ac.uk/Tracer
For more information and to download it, go to the Tracer web page.