This plant is commonly called 'String of Pearls,' but SP says it looks like peas and I think that's a better name so String of Peas it is. It's Senecio rowleyanus (although my label read 'Senecio rowleyana, I wonder if someone wrote that incorrectly deliberately... assuming that Wikipedia has the correct name?)
Anyway, I came across a cheap little pot of the plant in the local Ikea (I do like them for their selection of cheap little house plants) and snapped it up on impulse. Fortunately, the web tells me it's relatively low care (though not NO care; I don't believe any plant ever really is). I've potted it up in another Ikea pot I've had floating around for a while. It did have a baby bromeliad slowly growing in it... and then the cat ate most of it and so I had to turf it out. The pot doesn't have great drainage - only a very small hole in the bottom - so I've filled the bottom inch with gravel, then potted up the plant in a mix if about 1/4 sand (borrowed from the retaining work D is doing out the back) and 3/4 ordinary potting mix. Cactus mix would have also been appropriate if I'd had any.
Let's hope the cat stays away from this one; the leaves are poisonous and not to be consumed.