As you know Apple is very strict and most of the time is what you see is what you get on their OS. Saw Bitbar app on a technology site and I find it is interesting to add spice in your Mac which includes many helping tools from finance to gaming. It is FREE too. I have not tried them myself, just thought I share with you.
The BitBar app lets you put the output from any script or program right in your Mac OS X menu bar. And it's completely free. An impressive number of plugins have already been contributed by a wide range of developers just like you, and this site makes it easy to find them.