Swimming by Google Plus I came across this app called brackets, which describes it on the official website as an OpenSource editor (MIT license) for web design and development of web technologies such as HTML, CSS and JavaScript.
The project was created and is maintained by our dear friend Adobe. It is currently in an experimental version. Among the characteristics that stand out brackets among other editors such as Sublime Text o bluefish to cite examples are:
Quick CSS and JavaScript editing
When editing the HTML document we can use the shortcut CTRL+E to access the CSS of the property that we are editing at that moment and modify it at will.
Display live of changes in CSS files in our browser
This feature is the most notable and the one I liked the most. We can see the changes we make in the CSS automatically in the browser while we edit it, no need to update it every moment for that  .
At the moment only supports Chrome y Chromium. I leave you a video of the official channel in English with more info and that shows the feature of live viewing (min 2:18):
Installing Brackets on Ubuntu 13.04 and derivatives
You can download the .deb from here To install it we can use GDebi, QAPT or in terminal.
For 32 bits:
dpkg -i brackets-sprint-28-LINUX32.deb
For 64 bits:
dpkg -i brackets-sprint-28-LINUX64.deb
When I installed it, the first thing that happened to me was that it was not running, this error would appear when executing it by terminal:
libudev.so.0: cannot open shared object file: No such file or directory
I googled and it solves by typing in terminal:
sudo ln -sf /lib/i386-linux-gnu/libudev.so.1 /lib/i386-linux-gnu/libudev.so.0
and matter resolved  .
The second "error" is that Brackets did not open Chromium for me to display the HTML file (with Google Chrome it should not give this error), on the official page in the FAQ section I found the way to fix this a very similar command ( creating a symbolic link):
sudo ln -s /usr/bin/chromium-browser /usr/bin/google-chrome
Now if everything should be working 100%. Regards !!.