  The light unflavoured meson $\eta/\eta^{\prime}$ decays are valuable for
testing non-perturbative quantum chromodynamics and exploring new physics
beyond the Standard Model. This paper describes a series of event generators,
including $\eta/\eta^{\prime}\to\gamma l^{+}l^{-}$,
$\eta/\eta^{\prime}\to\gamma \pi^{+}\pi^{-}$, $\eta^{\prime}\to\omega
e^{+}e^{-}$, $\eta\to\pi^{+}\pi^{-}\pi^{0}$,
$\eta/\eta^{\prime}\to\pi^{0}\pi^{0}\pi^{0}$, $\eta^{\prime}\to\eta\pi\pi$ and
$\eta^{\prime}\to\pi^{+}\pi^{-}\pi^{+}\pi^{-}/\pi^{+}\pi^{-}\pi^{0}\pi^{0}$,
which have been developed for investigating $\eta/\eta^\prime$ decay dynamics.
For most of these generators, their usability has been validated in BESIII
analyses for determining the detection efficiency, and background studies. The
consistency between data and Monte Carlo shows that these generators work well
in the BESIII simulation, and will also be useful for ongoing BESIII analyses
and other experiments for studying $\eta/\eta^\prime$ physics.
