List seems to be (looking at http://www.oreilly.com/programming/free/20-python-libraries-you-arent-using-but-should.csp):
collections
contextlib
concurrent.futures
logging
sched
flit
colorama
begins
pyqtgraph
pywebview
watchdog
psutil
ptpython
hug
arrow
parsedatetime
boltons
cython
awesome-python