Atom Is Now Open Source
Fun!  A few days ago I mentioned I wish Sublime Text could have preview panes, but it only does text. [1]  This editor does just that!  Unfortunately it's very sluggish.  Which also ties back to a comment about another HTML5 text editor. [2]  I want to love this editor so bad, but I'll wait until the performance improves.[1] https://news.ycombinator.com/item?id=7696555
[2] https://news.ycombinator.com/item?id=7696593