From Animal Software:
Dolphin Text Editor Menu expands the functionality of any text editor by adding an extra menu allowing you to sort text alphabetically, reverse line order, remove blank lines, change case to upper/lower/title, remove duplicate lines, and various 'text cleaning' options. Dolphin Text Editor Menu gives you numerous text formatting tools, but only shows itself when it is needed.
What's new in this version:
Version 1.7 improved how change case: sentence works, fixed bug that causes Dolphin Text Editor Menu to sometimes crash when using Remove: Trailing spaces, and the last formatting option used is now stored when the application is closed.