  In this talk we review results from studies with unconventional many hadron
systems containing mesons: systems with two mesons and one baryon, three
mesons, some novel systems with two baryons and one meson, and finally systems
with many vector mesons, up to six, with their spins aligned forming states of
increasing spin. We show that in many cases one has experimental counterparts
for the states found, while in some other cases they remain as predictions,
which we suggest to be searched in BESIII, Belle, LHCb, FAIR and other
facilities.
