Very elegant implementation of many handy 'text editing' features that you wish would be universally available, but prior to Text Tools, never seem to be there when you needed them most. Well, now they are. Apple's Text Edit has grown to be quite a powerful word processors in its own right and 'Text Tools' notches things up a bit with the new additional functions it brings into play - most notably, Styles, Copy/Paste Styles, Special Characters, and Substitutions. Contextual access to other already built-in features such as Table, Spacing, and more. Being able to easily add any of those features to formerly simple text-type applications such as 'Stickies' makes them finally valuable applications.
Just a word about the developer - he's a very responsive communicator. When I mentioned some problems that I was having with earlier versions, he responded immediately to my email and remedied the concerns, first with a work-around (version 1.2) and then with a permanent fix (version 1.2.2).