Notepad++ comes with a feature where if you double click a variable it will highlight all other instances of that variable in the open document. I wanted this feature in FD so i decided to write this plugin.
This plugin is very simple and borrows much of the code from the quick-find plugin.
I wrote this little plugin an an hour or so last night, i hope others find it useful too
More info and download link on the FlashDevelop forums: http://www.flashdevelop.org/community/viewtopic.php?f=4&t=4486