Some compounds with names that suggest that they are homoleptic are in fact heteroleptic, because they have ligands in them which are not featured in the name. For instance dialkyl magnesium complexes which are found in the equilibrium which exists in a solution of a Grignard reagent in an ether, have two ether ligands attached to each magnesium centre.
Any metal species which has more than one type of ligand is heteroleptic.
It is possible for some ligands such as DMSO to bind with two or more different coordination modes. It would still be reasonable to consider a complex which has only one type of ligand but with different coordination modes to be homoleptic. For the complex dichlorotetrakis(dimethyl sulfoxide)ruthenium(II), DMSO coordinates via both sulfur and oxygen atoms.