  The full data set of the NEMO-3 experiment has been used to measure the
half-life of the two-neutrino double beta decay of $^{100}$Mo to the ground
state of $^{100}$Ru, $T_{1/2} = \left[ 6.81 \pm 0.01\,\left(\mbox{stat}\right)
^{+0.38}_{-0.40}\,\left(\mbox{syst}\right) \right] \times10^{18}$ y. The
two-electron energy sum, single electron energy spectra and distribution of the
angle between the electrons are presented with an unprecedented statistics of
$5\times10^5$ events and a signal-to-background ratio of ~80. Clear evidence
for the Single State Dominance model is found for this nuclear transition.
Limits on Majoron emitting neutrinoless double beta decay modes with spectral
indices of n=2,3,7, as well as constraints on Lorentz invariance violation and
on the bosonic neutrino contribution to the two-neutrino double beta decay mode
are obtained.
