(this is a re-post from the OP because he posted it in comments and will undoubtedly be buried by more comments)
terraformerbarren
terraformermoon
terraformerocean
terraformertoxic
microformercellular
microformercolourful
microformerminivillage
microformerprism
microformerstonecaves
microformerswamp

The following objects only work with the Legacy Biomes mod installed (along with the Legacy Objects mod ), and require the Legacy Biomes - Terraformers mod to be spawnable:
swtjc_lp_microformerheck
swtjc_lp_microformerrust
swtjc_lp_microformertoxicplains