BaBar

The BaBar Collaboration has an intensive program studying the hadronic cross section at low-energy $e^+e^-$ collisions, accessible at BaBar via initial-state radiation (ISR). These measurements allow significant improvements in the accuracy of the predicted value of the muon anomalous magnetic moment, which is necessary for shedding light on the current ~3.5 sigma difference between prediction and experiment. A number of processes with two to six hadrons in final states have been published by BaBar. We report the results of recent studies on the reactions $e^+ e^- \rightarrow \pi^+\pi^-\pi^0\pi^0$, $K_SK_L$, $K_SK_L\pi^+\pi^-$, $K_SK_S\pi^+\pi^-$, and $K^+K^-$ obtained via ISR. Number of intermediate states have been studied for the multi-hadron states as well as measurements of $J/\psi$ branching fractions to these channels.