Asymptote currently ships with the following base modules:
plainsimplexmathinterpolategeometrytremblingstatspatternsmarkersmaptreebinarytreedrawtreesyzygyfeynmanroundedpathanimationembedslideMetaPostbabellabelpathlabelpath3annotateCADgraphpalettethreeobjgraph3grid3solidstubeflowchartcontourcontour3smoothcontour3slopefieldode