Mine is always good old http://zombo.com.

I’ve used http://www.fake.com for years just because it worked. If that London-based artificial plant company ever goes out of business, I don’t know what I’ll do! ;)

I use http://bbspot.com since it'll probably never have ssl and the mid-2000s nostalgia.

I think it's common in France. I've been using perdu.com for long for that purpose.