Light Table 0.5.0 by Chris Granger.
A little later than the first week or two of August, 2013, but not by much!
Chris says Light Table is a next-gen IDE.
He may be right but to evaluate that claim, you will need to download the alpha here.
I must confess I am curious about his claim:
With the work we did to add background processing and a good deal of effort toward ensuring everything ran fast, LightTable is now comparable in speed to Vim and faster than Emacs or Sublime in most things. (emphasis added)
I want to know what “most things” Light Table does faster than Emacs. 😉
Are you downloading a copy yet?