If you are using textpad or notepad frequently and gets distracted while composing text, then Dark Copy is worth a try. Dark Copy is a free web based service which is a simple and dark text editor. DarkCopy is for anyone who enjoys the simplicity of a typewriter, and wants to increase productivity by focusing only on writing. Dark Copy also has a full screen mode for better writing.
Apart from composing text, there isn’t anything more with Dark Copy. Once you have finished composing the text, there is a button for saving the file. Once you click on the save as file option, it download the file in .txt format.
Dark Copy is for anyone who uses notepad frequently.
There is another available which is also open source is DarkRoom.Both functioning is same.