One of the ones that I want to point out is the ability to modify the settings of it's internal code editor in order to look and behave something like the following screenshot...
CodeKit Configuration Settings
theme- Color scheme that will be used for the editor.
Currently the following themes exist: solarized-light, solarized-dark, monokai, vibrant-ink, cobalt, blackboard, ambiance, & jsbin (default)
indentUnit- The number of spaces inside a block of code
smartIndent- Automatically indent based on the context of what you are doing
tabSize- This defines the width of the tab character
indentWithTabs- Determines to use tabs instead of spaces when you intent
autoClearEmptyLines- Clears whitespace only lines when the cursor exits the line
lineWrapping- Wrap the contents of the line if it extends outside of the viewable area
lineNumbers- This will show lines numbers in the left gutter
matchBrackets- Matches associated bracket when your cursor is on a bracket
Making Changes to Your Editor Settings
You can set the above options manually in your browser's console like the following snippet of code...
Sharing Your Editor Settings With Others
If you want to share with others your settings for a specific JSBin you can add an
apiURL parameter pointing to a configuration file.
The following URL will load JSBin with a custom set of code editor options.
http://j.mp/jsbin-settingsfile I am using looks like the following...
Remy has been making videos about various features of JSBin on his Tips and Bits blog. You can view the video about the above feature here...