Resonance phenomena in light heavy-ion collisions are experimentally well established and their observation can be understood in terms of the number of open reaction channels. In the cases of $^{12}C+^{12}$C \to $^{24}$Mg, $^{12}C+^{16}$O \to $^{28}$Si and $^{24}Mg+^{24}$Mg \to $^{48}$Cr, similar and strikingly narrow resonances have been observed. New results or proposed experiments on the , fragment and particle decays of these resonances are presented.