I recently created an online code editor that enables you to edit your websites code via FTP from any device with an internet browser. Please check it out: http://childers.com/projects/editr/ . To make an account, you enter the username ‘editr’ and password ‘Ed1ter’. Then, you create an account with a username, password and enter the FTP information for the site you’ll be editing. Then you can log in and edit it. After looking at it, do you think it would be appropriate to put for sale on codecanyon/themeforest or should I sell it without a platform on it’s own site? Please let me know what you think and any feedback you might about editr.
Can’t open the link you provide because of error, but from description your work is suited for CodeCanyon.