mmb 4.0.0+dfsg-2 (ppc64el binary) in ubuntu lunar

 MacroMoleculeBuilder, previously known as RNABuilder, can be used for morphing,
 homology modeling, folding (e.g. using base pairing contacts), redesigning
 complexes, fitting to low-resolution density maps, predicting local
 rearrangements upon mutation, and many other applications.