It could be desperately thirsty or drowned depending on the state of the soil. The symptoms are similar. Also, as you are in Canada, maybe your temps are already starting to drop at night and it's got cold? The Fuchsia in the next pot looks even sicker. They are both trained as standards. The droopy one is not dead imo and even the one which is a stick might be OK. Does it snap dryly or do the twigs bend and have green inside? You can keep them over winter in a dormant state in cool place like a porch or basement. I wouldn't attempt to keep them growing inside in winter. They're likely to end up weedy and bug ridden. Where I am I can leave them outside against the house wall covered in leaves. But I doubt that'll work for you. This post was edited by florauk on Mon, Sep 2, 13 at 17:11

I'm not getting the best view on my screen (I can't tell too much about the leaves-- they look essentially smooth and round? and I can't tell if the long dark streak is actually part of the plant-- sorry about that). My first thought was Pilea (money plant, among other names), but that's pretty much a shot in the dark.

That's Aloysia citrodora, Lemon Verbena, as Fata says. Not to be confused with Lemon Balm, Melissa officinalis.

It appears to be an Alternanthera. https://www.google.com/search?q=alternanthera+red+foliage&source=lnms&tbm=isch&sa=X&ved=0ahUKEwj1jJi9sLLWAhXjiFQKHWIyDeEQ_AUICigB&biw=1920&bih=940