What best (free) tools exists to view VCD files

[matrixofdynamism]

When running a simulation in verilog, it is possible for one to use $dumpfile to dump simulation data into a VCD file. This VCD file does not seem to be human comprehend-able. What tools exist to view the stored data in these files graphically? As far as I know they are to be viewed using some sort of waveform viewer. However, I am not aware of any at the moment.

 

[ads-ee]

I've used this before. http://gtkwave.sourceforge.net/

If you google for VCD viewer there are quite a few more hits, but I've only had experience using gtkwave.