“EverNote Corporation’s mission is to give users the ability to instantly create, organize and find any notes or content – and to make this information accessible at any time, in any place.
Built on a new metaphor for note management, our flagship product, EverNote 1.1, provides a single place where users can easily record, categorize and instantly find any type of content, including Web clips, images, emails, text and handwritten notes.”
This had got categories. ie you can tag files . . .
EditPadLite The free version.
There is a professional version: “EditPad Pro is a powerful and versatile text editor or word processor. Designed to make text editing as convenient as possible, using EditPad Pro to edit text files will save you a lot of time and frustration”
I’m trying this at the moment, and may buy it. It has bookmarks, lots of text windows and a spell checker.