Thanks =)
In my 60-liter tank there are at least:
Echinodorus quadricostatus "magdalenensis"
Echinodorus tenellus
Echinodorus cordifolius
Eleocharis acicularis
Cryptocoryne willisii
Sagittaria subulata
Heteranthera zosterifolia
Heteranthera dubia
Egeria densa
Shinnersia rivularis
Nymphaea sp.
Gymnocoronis spilanthoides
Hydrocotyle leucocephala
Cardamine lyrata
Cabomba caroliniana
Cryptocoryne sp.
Hygrophila corymbosa
Hygrophila difformis
Myriophyllum aquaticum
Rotala rotundifolia
Rotala wallichii
Ludwigia spec. "Cuba"
Microsorum pteropus
Vallisneria asiatica var. biwaensis
Vallisneria gigantea
Vesicularia dubyana
Phyllanthus fluitans
Hygroryza aristata
Lemna minor
Spirodela polyrhiza
Riccia fluitans
Alternanthera aquatica
Of course most of those species won't stay in that 60-liter tank for ever. They don't fit in there if I don't prune them quite hard every week =)