Splash
Splash is a free and open source visualisation tool for SPH data, developed closely alongside Phantom.
Examples
Plot column density render of all snapshots from a simulation:
splash -r density dump_0*
Make an mp4 movie of the above, like so:
splash -r density dump_0* --movie
which produces something like
splash can also be used to plot the energy vs time files:
splash *.ev
including automatic recognition of column labels