I would love to grow that Maple but alas, no room. :o( The ground cover amongst your Violets is Wandering Jew...a weed. Can cause skin allergies on dogs. It is hard to get rid of because anything left will grow back. Vigilance is needed. The garage wall has Ficus pumila, creeping fig. It is pretty and useful but if not kept under strict control, can turn into a monster....you might want to Google information about it before the trouble begins. The small plant with the shiny leaves is Coprosma. Considered a weed in Melbourne. An untidy bush that is hard to keep to a decent shape and reseeds everywhere. I would pull it out now while it's small. Sorry to be so negative, just being honest. Dee.

Aristolochia arborea, perhaps. Here is a link that might be useful: images

I'm not sure any of these plants are gesneriads. Most gesneriads aren't terribly succulent, but there are exceptions. The plant on the lower left does bear a resemblance to Columnea hirta "Light Prince," but it's very difficult, if not impossible to ID any Columnea that came without a name label. Once they get bigger and bloom it'll be much easier to ID these plants to at least the genus level, and Columnea sp. have very distinctive blooms. The plant on the lower right bears a slight resemblance to Primulina tamiana as well, but I do not think of the leaves as being succulent. This plant also has very distinctive blooms, so once it does flower it should be relatively easy to determine if it is in face P. tamiana. Mark

Yes I am sure it is Glechoma......."Ground Ivy". Invasive in lawns. Leaves have an interesting scent when crushed.....supposedly can be used herbally to help people with migranes. There is actually also a variegated cultivar of this around.