grnesmith

This Plugin adds the ability to change the vertical screen columns on the admin dashboard. To make a change to the amount of columns displayed click the screen options drop down and select the number of columns under screen layout.

Admin Column View Selector

This Plugin adds the ability to change the columns on the admin Dashboard screen.

pixelgrade

vlad.olaru

George Olaru

With <a href="https://github.com/pixelgrade/pixcodes" rel="nofollow ugc">PixCodes</a> you can have a shortcode insert interface.
The awesome part is that you can filter any shortcode parameters or overwrite any shortcode template with your theme.
Note: this plugin does not add any style to the output of shortcodes.
We believe that shortcodes functionality should be offered by a plugin and the style should be provided by themes.
Here is a <a href="http://github.com/pixelgrade/pixcodes/blob/master/README.md" rel="nofollow ugc">detailed documentation</a> about how you can configure some plugin settings and output.

PixCodes

PixCodes offers you a nice interface to add shortcodes into editor.

Admin Column View Selector vs PixCodes