Plotting with Torch7
Actually, dygraph/NVD3 provides the best plotting facilities. Yet, they are a bit technical and they are heavy to implement. So, use them if you need interactive plotting with complex data. In addition, you need to be a bit familiar with web development.
Bokeh/iTorch provides the best tool out-of the box. It is easy to use and it has nice figures. Yet, you may be a bit limited if you want advanced stuff. If a new wrapper is developed, I think this API may become the best one to use.
If you are a gnuplot expert. Keep using to it. Gnuplot is powerful even if it is a bit old-fashioned. It still does the work very well. Otherwise, prefer Bokeh/iTorch.