but there are actually a few other like cryptsy and poloniex, but what it matter more is a strong name, not the fact that contain bit, coin ecc.., i find for example bittrex as strong name
Kidding, obviously a name doesn't correlate with business success (unless the name is personally offensive to many people).
Xapo is a cool name.
What others exist? Give it time and you'll see tones of creativity out there. Part of the draw to a bit- or a -coin name is that bitcoin is still so new, there needs to be some brand recognition for these new companies.
not to mention mintpal, was original, but we all know what happened...