Edit: DO NOT USE THIS TOOL - use this one instead: http://www.ownedcore.com/forums/worl...or-gui-v2.html
If you use this tool it will cause many, many bugs. So use V2 in the linked thread.
I made a spell editor GUI. I made it for private use and rushed it, so the code is very bad and it does not support everything. But it is a base and a tool that people can use if they want to. :-)
You can download from here: https://dl.dropboxusercontent.com/u/...lEditorGUI.zip
GitHub: https://github.com/stoneharry/Spell-Editor-GUI
It only supports 3.3.5a (12340) version of Spell DBC and localisation is supported.