Tipo - literally 'type', but the equivalent in informal language would be 'like'. "Ho dormito tipo due ore" = 'I slept for like two hours".
Anche - also. But is used for emphasis, such as in "Ma anche no!" literally "But also no!".
Decisamente - not strictly a filler word; it can be translated into 'definitely', 'greately' or 'positively' amongst other things. "Oggi fa decisamente più caldo" could be translated as 'Today it's definitely hotter'.